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Hytrin (Terazosin)

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Hytrin is a high-quality medication which is taken in treatment of hypertension. It is also used in the treatment of benign prostatic hyperplasia. It is working by tightening of a certain type of muscle in the prostate and at the opening of the bladder.

Other names for this medication:

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Also known as:  Terazosin.


Hytrin is an effective remedy against hypertension. Its target is the treatment of benign prostatic hyperplasia.

Hytrin is working by tightening of a certain type of muscle in the prostate and at the opening of the bladder.

Hytrin is also known as Terazosin, Terapress.


Take Hytrin tablets orally with or without food.

Do not crush or chew it.

Take Hytrin at the same time once a day with water.

If you want to achieve most effective results do not stop taking Hytrin suddenly.


If you overdose Hytrin and you don't feel good you should visit your doctor or health care provider immediately. Symptoms of Hytrin overdosage: fainting, shock, dizziness.


Store at room temperature between 20 and 25 degrees C (68 and 77 degrees F) away from moisture, light and heat. Higher temperatures may cause the capsules to soften or melt. Throw away any unused medicine after the expiration date. Keep out of the reach of children.

Side effects

The most common side effects associated with Hytrin are:

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Side effect occurrence does not only depend on medication you are taking, but also on your overall health and other factors.


Do not take Hytrin if you are allergic to Hytrin components.

Do not take Hytrin if you're pregnant or you plan to have a baby, or you are a nursing mother.

Try to be careful using Hytrin if you are taking nonsteroidal anti-inflammatory painkillers such as Motrin and Naprosyn, other blood pressure medications, such as Dyazide, Vasotec, Verelan, Calan.

If you want to achieve most effective results without any side effects it is better to avoid alcohol.

Be careful in case of machine driving.

Do not stop taking Hytrin suddenly.

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A robust experimental design method was developed with the well-established response surface methodology and time series modeling to facilitate the formulation development process with magnesium stearate incorporated into hydrophilic matrix tablets. Two directional analyses and a time-oriented model were utilized to optimize the experimental responses. Evaluations of tablet gelation and drug release were conducted with two factors x₁ and x₂: one was a formulation factor (the amount of magnesium stearate) and the other was a processing factor (mixing time), respectively. Moreover, different batch sizes (100 and 500 tablet batches) were also evaluated to investigate an effect of batch size. The selected input control factors were arranged in a mixture simplex lattice design with 13 experimental runs. The obtained optimal settings of magnesium stearate for gelation were 0.46 g, 2.76 min (mixing time) for a 100 tablet batch and 1.54 g, 6.51 min for a 500 tablet batch. The optimal settings for drug release were 0.33 g, 7.99 min for a 100 tablet batch and 1.54 g, 6.51 min for a 500 tablet batch. The exact ratio and mixing time of magnesium stearate could be formulated according to the resulting hydrophilic matrix tablet properties. The newly designed experimental method provided very useful information for characterizing significant factors and hence to obtain optimum formulations allowing for a systematic and reliable experimental design method.

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Benign prostatic hyperplasia (BPH) is very common in older men, causing symptoms that can markedly impair quality of life. Surgical treatment, typically transurethral resection of the prostate (TURP), is highly effective but can be costly and is associated with the risk for significant morbidity. Medical treatments for BPH are targeted toward reducing bladder outlet obstruction either by androgen blockade to reduce prostatic volume or alpha-adrenergic blockade to relax the smooth muscle tone of the prostate. In recent years, understanding of the sympathetic innervation of the prostate has improved. This has been paralleled by the development of alpha-adrenergic blocking agents, from nonselective alpha-antagonists, to selective alpha1-antagonists, to the more selective alpha1A-antagonists. It is anticipated that more specific agents will optimize the therapeutic effectiveness of alpha-adrenergic blockade in the prostate while reducing the side effects associated with alpha-adrenergic blockade in other areas of the body, such as the vascular system. This article reviews the evolution of alpha-blockade therapy in management of BPH, focusing on tamsulosin, an agent targeted toward the alpha1A-adrenoceptor that predominates in the prostate. Clinical trials in Europe and the United States have provided evidence that tamsulosin is effective at doses of 0.4 and 0.8 mg/day. At both doses, tamsulosin is associated with significant improvements in the American Urological Association symptom score and the mean and peak urinary flow rates as compared with placebo. This once-daily alpha1A-adrenergic antagonist is well-tolerated, with a minimal potential for the side effects associated with alphas-blocker therapy.

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Benign Prostatic Hyperplasia (BPH) usually occurs in males 45-50 old and progressively involves 75% of the male population over 75 years of age. The clinical manifestations of BPH are related primarily to bladder outlet obstructions resulting from enlargement (mechanical component) of the prostate gland, and from extrinsic and intrinsic sympathetic activation of alpha-adrenoceptors (dynamic component) present in the prostatic muscle tissue, prostatic urethra, bladder base and neck. Several drugs have been employed in the last decades: LHRH analogs (Leuprorelin and Goserelin) which can reduce the testicular production of androgens with reduction in prostate size; Serenoa repens for its anti-androgenic and anti-estrogenic activities; Finasteride (5-alpha-reductase inhibitor) which blocks the conversion of testosterone into the more active dihydrotestosterone. Finally, the alpha 1 blocking agents (Terazosin, Doxazosin, Tamsulosin) that improve urinary symptoms by acting on dynamic component. Clinical improvements derive from their antagonist action on alpha 1 adrenergic receptors which mediate contraction of the prostate gland, proximal urethra, bladder base and neck, with the consequent reduction of urethral pressure, bladder outlet resistance, and increase of urinary flow. Due to its pharmacodynamic and pharmacokinetic properties, as well as the clinical results obtained, Terazosin, alpha 1 blocker, appears to be particularly useful in the treatment of patients with mild- to moderate symptomatic BPH.

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Patients on AB/AM combination therapy remained on alpha blockers for longer than those on alpha blocker monotherapy (p = 0.04); 92.4% were persistent at 3 months versus 89.0%, and at 1 year 50.8% were persistent versus 49.6%, respectively. The highest number of days on therapy was reported for tamsulosin plus solifenacin. As confirmed by multivariate analysis, patients with the highest adherence to AM medication (= 80%) persisted on alpha blockers for longer than those with the lowest (< 50%) adherence (p < 0.05).

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Reversal of left ventricular (LV) hypertrophy is an important goal of antihypertensive therapy. This phase 3b study compared the ability of the angiotensin receptor blocker olmesartan medoxomil with the calcium channel blocker amlodipine besylate to induce regression of LV hypertrophy and vascular hypertrophy after achieving blood pressure (BP) goal. After a washout phase, 102 patients with hypertension and LV hypertrophy were randomized to olmesartan medoxomil 20 mg/day, up titrated to 40 mg/day, or amlodipine 5 mg/day, up titrated to 10 mg/day, for up to 4 weeks until a BP goal of <140/90 mm Hg (<130/85 mm Hg for diabetes) was achieved (hydrochlorothiazide 25 mg/day and terazosin 1 to 5 mg/day 2 times/day could be added if needed). Upon achieving the BP goal or by week 8, and again at weeks 26 and 52, assessments of LV mass and compliance and arterial structure and function were performed by echocardiography, Doppler flow, and arterial ultrasonography, respectively. There was no statistically significant percent change in LV mass at 52 weeks in either treatment group (11.6% with olmesartan medoxomil vs 2.9% with amlodipine) and no statistically significant difference between treatment groups. There were no significant changes in LV compliance or carotid or femoral artery wall-to-lumen ratios in either treatment group at 52 weeks. In conclusion, there did not appear to be a clinically significant BP-independent effect with olmesartan medoxomil or amlodipine on LV mass decrease, diastolic function or vascular structure, and compliance in patients with hypertension and LV hypertrophy.

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The cultured prostatic cells demonstrated hill and valley morphology, which is a hallmark of smooth muscle cells in vitro, and stained positively for desmin. In addition, electron microscopic examination of ultrastructural morphology revealed myofilaments. Confluent cultures of prostatic smooth muscle cells showed a clear, dose-dependent contractile response to phenylephrine. Furthermore, contraction of the prostatic smooth muscle cells by 10(-6) mol/L phenylephrine was completely inhibited by pretreatment with 10(-6) mol/L terazosin.

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Benign prostatic hyperplasia (BPH) can have a profound affect on a patient's quality of life and sexual function and is considered by patients to be one of the most important aspects affected by the disease. Different treatments can produce a variable response in terms of the patient's quality of life, including sexual activity and satisfaction. Varying rates of erectile dysfunction (ED) and retrograde ejaculation following surgery for BPH have been reported. In general, the incidence of these side-effects is less after minimally invasive therapies, such as interstitial laser coagulation and transurethral microwave therapy, but the data available are limited. The lowest rates of sexual dysfunction are reported with medical therapies. The 5alpha-reductase inhibitor, finasteride, can result in ED in 5-9% of patients and ejaculation disorders in 0.8-2.0%. With the exception of tamsulosin, alpha(1) blockers are associated with a low rate of sexual dysfunction. No cases of ED have been reported with alfuzosin and abnormal ejaculation with terazosin or alfuzosin is negligible. Indeed, early research suggests a beneficial effect of alpha(1) blockers on sexual function. In addition to information on the efficacy of a particular therapy, patients should be informed of side effects, in particular those relating to sexual function, in order that they can make informed treatment decisions.Prostate Cancer and Prostatic Diseases (2001) 4, S12-S16

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Meal ingestion stimulates an increase in small intestinal water and electrolyte absorption. Endogenous norepinephrine may at least partially mediate this meal-stimulated proabsorptive response. Luminally administered alpha 1-adrenergic agonists such as norepinephrine and phenylephrine cause significant small bowel absorption, which can be prevented by the selective alpha 1-adrenergic antagonist terazosin. This study tested two hypotheses: (1) a meal stimulates ileal water, electrolyte, and glucose absorption; and (2) meal-stimulated ileal absorption is mediated via alpha 1-adrenergic receptor activation. Absorption studies (N = 27) were performed on dogs with 25-cm ileal Thirty-Vella fistulas (TVF). Perfusion with [14C]PEG was used to calculate absorption of water, electrolytes, and glucose from the TVF. Three groups were randomly studied over 4 hr: (1) terazosin alone, (2) meal alone, and (3) terazosin plus meal. Terazosin (10(-4) M) was administered to the TVF in groups 1 and 3 following the first hour. A 480-kcal mixed canine meal was ingested at the end of the second hour in groups 2 and 3. Ileal water, electrolyte, and glucose absorption increased significantly in response to meal ingestion (P < 0.05). Luminal terazosin did not significantly alter basal or meal-stimulated ileal absorption. In conclusion, meal ingestion stimulates ileal absorption of water, electrolytes, and glucose. Neither basal nor meal-stimulated ileal absorption is altered by alpha 1-adrenergic receptor blockade. These data suggest that nonadrenergic neural pathways or humoral factors are the likely mediators of meal-induced intestinal absorption.

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Terazosin is a new long-acting, selective alpha 1-adrenergic antagonist. Its pharmacokinetic and pharmacodynamic profiles are similar to those of prazosin, but terazosin has a half-life three to four times longer. This allows once daily dosing of terazosin and a potential advantage in ensuring patient compliance to treatment. Terazosin has been evaluated alone and in combination with other drugs for the treatment of mild to moderate hypertension. Terazosin has been shown to have favorable lipid and side effect profiles. Unlike prazosin, the drug is available (but not yet marketed) in parenteral form. Its gradual onset of action with intravenous use would limit its potential application in hypertensive emergencies. Other possible uses for terazosin might include treatment of congestive heart failure and Raynaud's phenomenon, but definitive studies are needed.

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Indirect comparison of data derived from the placebo-controlled studies involving 6,333 patients and the data derived from the direct comparative studies involving 507 patients demonstrate that all alpha1-adrenoceptor antagonists (alfuzosin, terazosin, doxazosin and tamsulosin) produce comparable improvements in LUTS and urinary flow. Total symptom score is in general improved by 30-40% and Qmax by 16-25%. The difference between currently available alpha1-adrenoceptor antagonists is related to their side effect profile. Alfuzosin (especially the sustained release formulation) and tamsulosin (modified release formulation 0.4 mg) seem to be better tolerated than terazosin and doxazosin. The percentage of patients that withdrew due to bothersome side effects with alfuzosin and tamsulosin 0.4 mg was comparable to that with placebo (about 4-10%) whereas in the terazosin and doxazosin studies an additional 4-10% of patients dropped out because they did not tolerate the therapy. Tamsulosin has less effect on blood pressure than alfuzosin (especially in elderly patients) and causes less symptomatic orthostatic hypotension during orthostatic stress testing than terazosin.

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A total of 1,229 subjects with clinical benign prostatic hyperplasia (BPH) were randomized to 1 year of placebo, finasteride, terazosin or drug combination. The primary outcome measures were American Urological Association (AUA) symptom score and peak flow rate. Relevant secondary outcome measures were symptom problem score, BPH impact score and global rating of improvement.

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Norepinephrine receptors have been studied in emotion, memory, and attention. However, the role of alpha1-adrenergic receptors in fear conditioning, a major model of emotional learning, is poorly understood. We examined the effect of terazosin, an alpha1-adrenergic receptor antagonist, on cued fear conditioning. Systemic or intra-lateral amygdala terazosin delivered before conditioning enhanced short- and long-term memory. Terazosin delivered after conditioning did not affect consolidation. In vitro, terazosin impaired lateral amygdala inhibitory postsynaptic currents leading to facilitation of excitatory postsynaptic currents and long-term potentiation. Since alpha1 blockers are prescribed for hypertension and post-traumatic stress disorder, these results may have important clinical implications.

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Finasteride, which inhibits the enzyme 5 alpha-reductase, reduces prostate size and relieves the symptoms of benign prostatic hyperplasia (BPH) in men with enlarged prostates. alpha 1 -Adrenoceptor antagonists, such as doxazosin and terazosin, are also effective in the treatment of BPH. Previous clinical studies in which finasteride had little or no effect alone, have shown little or no additive effect with alpha 1 -adrenoceptor antagonists. The Medical Therapy of Prostatic Symptoms study showed a considerable benefit with finasteride alone and an additive effect when administered with doxazosin. One interpretation of these results is that if finasteride is effective alone in BPH, the combination with an alpha 1 -adrenoceptor antagonist will give an additive effect.

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Between 1987 and 1995, 743 patients with clinically localized prostate cancer were treated with 3D-CRT. A total of 275 (37%) patients developed Grade 2 acute urinary symptoms as defined by the RTOG morbidity scoring system. Terazosin hydrochloride (THC), a selective alpha-1 adrenoceptor blocking agent, was given to 119 (43%) patients for treatment of their urinary symptoms, whereas nonsteroidal anti-inflammatory medications (NSAID) were administered to 71 patients (26%). Thirty-one patients (11%) were treated with other medications, and 54 (20%) did not seek pharmacologic intervention for their urinary symptoms. Patients were monitored weekly to assess changes in urinary urgency, frequency, and nocturia.

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Thirteen patients with essential hypertension were treated with an alpha 1-adrenoceptor antagonist, terazosin (1 to 4 mg/day) for 12 months. To assess the mechanism of its antihypertensive effect, the hemodynamic and endocrinological responses to terazosin were determined before, 3, and 12 months after the administration of terazosin. Blood pressure significantly decreased within 2 weeks after the start of terazosin and its effect was sustained throughout the 12 month period. Pulse rate did not change except slight increase in the third month. The hemodynamic studies revealed that total peripheral resistance significantly decreased and cardiac output slightly increased, indicating that the antihypertensive effect of terazosin is mainly produced by its vasodilation. Blood volume and plasma volume did not change. Although plasma renin activity remained the same, plasma aldosterone significantly decreased in response to terazosin. Plasma noradrenaline increased in the third month, but returned to the baseline level in the twelfth month. Thus, terazosin monotherapy lowered blood pressure throughout one year without drug tolerance including volume expansion and/or accentuation of renin-angiotensin-aldosterone system or sympathetic function.

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In all, 4571 cases and an equal number of controls were identified. Current use of alpha-blockers (prazosin, doxazosin, indoramin, terazosin, alfuzosin and tamsulosin) was compared with non-use of alpha-blockers. Current use of alpha-blockers on the index date was associated with an increased risk of hip/femur fracture [adjusted odds ratio (OR) 1.9, 95% confidence interval (CI): 1.1-3.0] in the overall analysis. The effect was particularly strong for first prescriptions within a treatment episode (adjusted OR 5.1, 95% CI: 1.0-31.7) and during the first month of treatment (adjusted OR 4.1, 95% CI: 0.7-23.9). Stratification according to indication of use showed that current use of alpha-blockers was not associated with hip/femur fracture in men with a diagnosis of benign prostatic hyperplasia (adjusted OR 1.0, 95% CI: 0.4-2.5), but was associated in men who used alpha-blockers for cardiovascular disease (adjusted OR 2.8, 95% CI: 1.4-5.4).

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In the present study the alpha 1 selective agonist phenylephrine (PE), the alpha 2 selective agonist clonidine (CLO) and the non-selective endogenous catecholamine norepinephrine (NE) and dopamine (DA) were injected directly into the blood supply of the paravertebral sympathetic ganglia (PSG) of anesthetized open-chest dogs. Intra-arterial injection of all agonists produced dose-dependent decreases in mean arterial pressure (MAP) and femoral vascular resistance (FVR) but had no effect on heart rate. Their potency order was CLO greater than NE greater than PE greater than DA. Intravenous injections of the medium dose for NE and PE produced significant increases in MAP, while the medium dose of CLO injected iv produced a small decrease in MAP. The ganglionic blocking agent, hexamethonium (10 mg/kg iv) completely eliminated the hypotensive response to all agonists. Intra-arterial administration of the alpha 1 selective antagonist terazosin (0.5 mg) significantly reduced the decrease in MAP produced by the ganglionic actions of PE, but had no significant effect on the response to CLO. In contrast, the alpha 2 selective antagonist rauwolscine (100 micrograms) significantly reduced the decreases in MAP produced by ia CLO, but not that produced by ia PE. However, both antagonists inhibited the hypotensive effect of NE and DA. These findings suggest that both subtypes of alpha-adrenoceptors, alpha 1 and alpha 2, are present in the PSG and that both subtypes are inhibitory since their activation results in reduced transmission of impulses through the ganglia.

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The authors concluded that treatment with terazosin was associated with greater peak urinary flow rate and lower symptom score than treatment with placebo. There was no variability of efficacy of terazosin as a result of prostrate volume, and measurement of prostrate volume was not essential before initiation of therapy.

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BPH is common in older men; more than 90% of men aged 70 and older suffer from BPH. (1,2) BPH has substantial negative effect on quality of life, with symptoms that interfere with activities of daily living. (3) The symptoms of BPH are primarily due to bladder outlet obstruction and are caused by dynamic prostatic smooth muscle tone and static prostatic obstruction. (4,5) The smooth muscle tone is dependent on the degree of the alpha-1 adrenergic receptors present in the bladder neck, prostrate capsule, and prostrate gland. The blockade of alpha-1 receptors with drugs such as terazosin reduces bladder outlet obstruction by reducing the smooth muscle tone. STUDY SELECTION AND DATA SOURCES: Selected studies were all RCTs of terazosin with two primary end points, namely, changes in the peak urinary flow rates and urinary symptom scores from baseline. Nine studies were selected using a Medline search, the details of which were not provided. The studies were conducted in North America and Europe between 1992 and 1996. Two of the studies included unpublished data that were obtained from Abbott Laboratories, which is the manufacturer of terazosin (Hytrin). The company also provided data on the other seven studies.

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Male patients over the age of 50 years were recruited from clinics over 3 months and divided into two groups: 18 study patients taking α(1)-adrenoreceptor antagonists (Flomax, Uroxatral, Cardura and Hytrin) and 31 control patients who had never been on them. Those with conditions known to affect pupil diameter were excluded. Pre-dilation pupil diameters were recorded using a pupillometer in mesopic and scotopic conditions. Right eyes were dilated with phenylephrine and tropicamide, and the left eye served as an undilated control. Following dilation, pupil diameters were measured in both lighting conditions.

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In benign prostatic hyperplasia (BPH) there will be a sudden impact on overall quality of life of patient. This disease occurs normally at the age of 40 or above and also is associated with sexual dysfunction. Thus, there is a need of update on current medications of this disease. The presented review provides information on medications available for BPH. Phytotherapies with some improvements in BPH are also included. Relevant articles were identified through a search of the English-language literature indexed on MEDLINE, PUBMED, Sciencedirect and the proceedings of scientific meetings. The search terms were BPH, medications for BPH, drugs for BPH, combination therapies for BPH, Phytotherapies for BPH, Ayurveda and BPH, BPH treatments in Ayurveda. Medications including watchful waitings, Alpha one adrenoreceptor blockers, 5-alpha reductase inhibitors, combination therapies including tamsulosin-dutasteride, doxazosin-finasteride, terazosin-finasteride, tolterodine-tamsulosin and rofecoxib-finasteride were found. Herbal remedies such as Cernilton, Saxifraga stolonifera, Zi-Shen Pill (ZSP), Orbignya speciosa, Phellodendron amurense, Ganoderma lucidum, Serenoa Repens, pumpkin extract and Lepidium meyenii (Red Maca) have some improvements on BPH are included. Other than these discussions on Ayurvedic medications, TURP and minimally invasive therapies (MITs) are also included. Recent advancements in terms of newly synthesized molecules are also discussed. Specific alpha one adrenoreceptor blockers such as tamsulosin and alfuzosin will remain preferred choice of urologists for symptom relief. Medications with combination therapies are still needs more investigation to establish as preference in initial stage for fast symptom relief reduced prostate growth and obviously reduce need for BPH-related surgery. Due to lack of proper evidence Phytotherapies are not gaining much advantage. MITs and TURP are expensive and are rarely supported by healthcare systems.

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In normal rats intracerebroventricular administration of 8 nmol. kg.-1 prazosin (Pfizer Central Research, Sandwich, United Kingdom) or terazosin (Abbott Laboratories, Abbott Park, Illinois) (nonsubtype selective) caused no change in cystometric parameters. At 24 or 80 nmol. kg.-1 the 2 drugs significantly decreased voiding pressure and increased bladder capacity, voided volume and post-void residual urine volume. Administering vehicle had no effect. In rats with outlet obstruction the drug effects were significantly more pronounced than in normal animals (p <0.05), and urinary retention was produced in 50% of rats receiving prazosin. In normal rats the selective alpha1A-adrenoceptor antagonists KMD 3213 (0.8, 8 and 24 nmol. kg.-1) dose dependently depressed voiding pressure, and increased bladder capacity and voided volume, whereas BMY 7378 (selective for alpha1D-adrenoceptors) and A322312 (selective for alpha1B-adrenoceptors) at doses up to 80 nmol. kg.-1 had no effect.

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Comparative morphometrical study of the renal glomerular system was carried out in hypertensive NISAG rats treated with hypotensive drugs during the prepubertal period. Blockade of the renin-angiotensin system with enalapril or losartan during the critical period of ontogeny (the 2nd month of life) produced a long-term hypotensive and renoprotective effect. Treatment with alpha-adrenoblocker terazosin during this period of ontogeny produced a less pronounced hypotensive effect, though with renoprotection. Corinfar (Ca2+ channel blocker) was least effective.

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Some α1 -adrenoceptor antagonists possess anti-cancer actions that are independent of α1 -adrenoceptors and the aim of these studies was to assess the relative cytotoxic potencies of α1 -adrenoceptor antagonists and the mechanisms involved in these actions.

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Parotid gland swelling is a less frequently reported side effect of clozapine and has no licensed treatment. A 58-year-old man treated with clozapine for treatment-resistant schizophrenia developed bilateral painful parotid swellings and hypersalivation. Initial trials of dose alteration and antihypersalivatory medication had limited success. A combination of benzatropine and terazosin was successful in treating the parotid hyperplasia. Clozapine was the probable cause of parotid swelling in our case, as established using the Naranjo adverse drug reaction probability scale and World Health Organization causality categories. Literature for treatments of clozapine-induced parotid gland swellings was reviewed. None of the published articles suggested a treatment regimen for clozapine-induced parotid hyperplasia. Most reports only highlighted the occurrence of salivary gland swelling with clozapine. Others mentioned management strategies, which included spontaneous resolution, or resolution on discontinuing clozapine. One report, a trial with benzatropine and ipratropium, had variable success. In this case the re-emergence of parotid swelling when terazosin and benzatropine doses were missed followed by a quick resolution upon recompliance, goes some way in proving that this combination is indeed effective. The combination of terazosin and benzatropine appears to have a role in treating parotid gland swellings induced by clozapine.

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The sympathetic nervous system plays a major role in the pathogenesis of essential hypertension and is mediated by the alpha and beta receptors. The alpha receptor is divided into two types, alpha 1 and alpha 2, based on response to epinephrine and norepinephrine. alpha 1-Adrenergic receptors have a high affinity for drugs such as prazosin, doxazosin, and terazosin, which act to reduce blood pressure by selective blockade of the receptor. These agents provide a rational approach to the treatment of hypertension by correcting elevated total peripheral resistance, the fundamental hemodynamic abnormality in essential hypertension. In contrast, early alpha-adrenergic receptor blockers nonselectively blocked both alpha 1 and alpha 2 receptors and were unsuitable as antihypertensive agents because they induced tachycardia and patients developed a tolerance to them rapidly. alpha 1-Adrenergic blockers also have beneficial effects on plasma lipoproteins, tending to decrease levels of triglycerides and cholesterol and increase levels of high-density lipoprotein (HDL) cholesterol and the HDL cholesterol/total cholesterol ratio. beta-Adrenergic blockers, such as propranolol and atenolol, have been shown to have an adverse effect on the lipid profile by tending to increase levels of triglycerides and decrease HDL cholesterol. A number of mechanisms contribute to these effects, in particular, adrenergic modulation of lipoprotein lipase and the triglyceride secretion rate. Doxazosin has been shown to increase the activity of LDL receptors, which may be partly responsible for its beneficial effect on plasma lipids and lipoproteins.(ABSTRACT TRUNCATED AT 250 WORDS)

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This analysis examines the relative effectiveness of current medical therapies for BPH in preventing AUR, AUR-related catheterisation and surgery in real-life clinical practice.

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The following databases were searched from inception to 6 August 2013 for published and unpublished research evidence: MEDLINE; EMBASE; Cumulative Index to Nursing and Allied Health Literature; The Cochrane Library including the Cochrane Systematic Reviews Database, Cochrane Controlled Trials Register, Database of Abstracts of Reviews of Effects and the Health Technology Assessment database; ISI Web of Science, including Science Citation Index, and the Conference Proceedings Citation Index-Science. The US Food and Drug Administration website and the European Medicines Agency (EMA) website were also searched.

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Fiduxosin is a new alpha(1)-adrenoceptor antagonist targeted for the treatment of symptomatic benign prostatic hyperplasia. The purpose of this study was to determine and compare the potencies of the alpha(1)-adrenoceptor antagonists terazosin, doxazosin, tamsulosin, and fiduxosin, based on relationships between plasma drug concentrations and blockade of phenylephrine (PE)-induced intraurethral (IUP) and mean arterial pressure (MAP) responses after single oral dosing in conscious male beagle dogs. Magnitude of blockade and plasma concentrations were evaluated at selected time points over 24 h. All drugs produced dose-dependent antagonism of PE-induced IUP and MAP responses. When IUP and MAP blockade effects were plotted against drug plasma concentrations, direct relationships were observed that were well described by the sigmoidal maximal effect model. IUP IC(50) values for terazosin, doxazosin, tamsulosin, and fiduxosin were 48.6, 48.7, 0.42, and 261 ng/ml, respectively. MAP IC(50) values were 12.2, 13.8, 1.07, and 1904 ng/ml, respectively. Uroselectivity index values, defined as MAP IC(50)/IUP IC(50), were 0.25, 0.28, 2.6, and 7.3, respectively. These results extend previous observations with terazosin in this model, showing that doxazosin exhibits a uroselectivity index comparable to terazosin, consistent with the lack of alpha(1)-adrenoceptor subtype selectivity or uroselectivity of these drugs. Tamsulosin, an alpha(1a)-/alpha(1d)-subtype selective agent, had an index value approximately 10-fold greater than the nonselective drugs. Based on its pharmacokinetic profile and a relative uroselectivity 29-fold greater than the nonselective drugs, fiduxosin is expected to exhibit greater selectivity for urethral compared with vascular alpha(1)-adrenoceptors in human and should be a novel, long-acting, uroselective alpha(1)-adrenoceptor antagonist.

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In diabetic rats the intravesical pressure thresholds for inducing urethral relaxation and the lowest urethral pressure (UPP nadir) during urethral relaxation were significantly higher by 142% and 86%, respectively, than in normal rats, while baseline UPPs were not significantly different. The mean rate of high frequency oscillations of urethral striated muscle in diabetic rats was also significantly lower by 23% than in normal rats. After alpha-bungarotoxin treatment (333 mug/kg intravenously) to eliminate striated muscle sphincter contractions the SD of baseline UPPs was significantly larger by 93% than in normal rats. Intravenous administration of terazosin (0.4 mg/kg), an alpha1-adrenoceptor antagonist, significantly decreased the UPP nadir, intravesical pressure thresholds inducing urethral relaxation and the SD by 41%, 87% and 138%, respectively, in diabetic rats but not in normal rats. In the 2 groups of animals after alpha-bungarotoxin treatment urethral relaxation during a reflex bladder contraction was inhibited by Nomega-nitro-L-arginine (40 mg/kg intravenously), a nitric oxide synthase inhibitor.

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tab hytrin 1mg 2015-12-06

To review key trials of monotherapy and combination therapy of alpha(1)-adrenergic receptor antagonists (alpha(1)-ARAs), 5alpha-reductase inhibitors (5alphaRIs) and anti-muscarinic agents in the treatment of lower urinary tract symptoms (LUTS) associated with benign prostatic hyperplasia (BPH). To assess the safety and efficacy of combination therapies for LUTS associated with BPH, a search of the MEDLINE and Cochrane databases (1976-2008) was conducted for relevant trials and reviews using the terms benign prostatic hyperplasia, lower urinary tract symptoms, alpha(1)-adrenergic receptor antagonists, 5alpha-reductase inhibitors, anti-muscarinics, anticholinergics, combination therapy, alfuzosin, doxazosin, tamsulosin, terazosin, dutasteride, finasteride, tolterodine, flavoxate, propiverine, oxybutynin, erectile dysfunction, sildenafil, vardenafil and tadalafil. Data from the Medical Therapy of Prostatic Symptoms (MTOPS) study indicated a role for long-term use of alpha(1)-ARAs and 5alphaRIs in combination. In the MTOPS study, combination therapy with the alpha(1)-ARA doxazosin and the 5alphaRI finasteride was significantly more effective than either component alone in reducing symptoms (P=0.006 vs doxazosin monotherapy; P<0.001 vs finasteride monotherapy) and in lowering the rate of clinical progression (P<0.001 vs either monotherapy). These findings were confirmed by the 2-year preliminary results of the Combination of Avodart and Tamsulosin study. In this study, combination therapy of the alpha(1)-ARA tamsulosin and the 5alphaRI dutasteride resulted in a significantly greater decrease in International Prostate Symptom Score (IPSS) when compared with either monotherapy. Several recent trials have studied the efficacy of combining alpha(1)-ARAs and anti-muscarinic agents in the treatment of BPH. These studies have found this combination to result in statistically significant benefits in quality of life scores, patient satisfaction, urinary frequency, storage symptoms and IPSS scores. Studies have not shown an increased risk of urinary retention associated with the use of anti-muscarinics in a highly select cohort of men with BPH. The available data suggest that combination therapy can be beneficial in the treatment of BPH and associated LUTS. The greatest efficacy for the alpha(1)-ARA and 5alphaRI combination was shown in patients with larger prostate size and more severe symptoms. The combination of alpha(1)-ARAs and 5alphaRIs appears to prevent disease progression in these patients. The combination of alpha(1)-ARAs with anti-muscarinic agents is useful for relieving symptoms of bladder outlet obstruction and detrusor overactivity. Theoretic concerns regarding the risk of acute urinary retention have been refuted in several recent clinical trials; buy hytrin however, it must be noted that the patients in these trials were a highly select cohort of men. Men with overactive bladder and BPH who are not receiving adequate alleviation of symptoms from the first-line alpha(1)-ARAs may benefit from the addition of an anti-muscarinic agent.

hytrin generic 2015-04-25

Pharmacokinetic and pharmacodynamic (changes in blood pressure) interactions between DA-8159 and terazosin were evaluated after simultaneous i.v. and p.o. administration of DA-8159 ( buy hytrin 30 mg kg(-1)) and terazosin (5 mg kg(-1)) to male Sprague-Dawley rats.

hytrin tablets uses 2015-12-22

This study was designed to evaluate the safety and efficacy of the selective alpha 1-adrenoceptor blocker terazosin in the treatment of benign prostatic hyperplasia (BPH buy hytrin ).

hytrin 1mg tablets 2015-04-27

The results of this 4-week, double-blind, randomized trial have demonstrated that in Chinese male hypertensive patients with LUTS, low-dose Amlodipine plus terazosin therapy appears to be a safe and effective combination therapy to control both conditions, especially for those with predominant overactive bladder buy hytrin symptoms.

hytrin dosage 2016-07-10

All patients with insufficient blood buy hytrin pressure control with either a calcium channel blocker or an ACE inhibitor and evidence of hyperlipidemia (total serum cholesterol > 5.69 mmol/L) were included into an open, randomized and prospective study to evaluate the effects of terazosin and atenolol on lipid profile in hypertensive patients. The patients received either terazosin (n = 26; dose 1 to 10 mg) or atenolol (n = 28; dose 25 to 100 mg). Blood pressure was assessed by 24-hour ambulatory blood pressure measurement and serum lipids were evaluated at the time of inclusion and 12 weeks later.

hytrin dose 2015-05-21

Selective alpha 1-adrenoceptor antagonists, which can be used as antihypertensives, cause dilation of both resistance and capacitance vessels, as a result of alpha 1-adrenoceptor blockade at postsynaptic sites. Reflex tachycardia is weak or absent, owing to the following mechanisms: (1) The absence of presynaptic alpha 2-receptor blockade, thus preventing the accelerated release of noradrenaline from the nerve endings; and (2) the blockade of central alpha 1-adrenoceptors, causing a blunting of the reflex tachycardia via the baroreceptor mechanism. Prazosin and its successor drugs doxazosin, trimazosin and terazosin are the prototypes of selective alpha 1-adrenoceptor antagonists. Urapidil, labetalol and ketanserin are well-known examples of hybrid drugs, which possess additional pharmacological activities besides their alpha 1-adrenoceptor antagonistic potency. Labetalol is predominantly a (beta 1 + beta 2)-blocker with buy hytrin much weaker alpha 1-adrenoceptor antagonistic activity. The compound contains four stereoisomers with different pharmacodynamic properties and as such is not a true hybrid drug. Ketanserin is a selective 5-hydroxytryptamine (5HT2)-receptor antagonist, with modest alpha 1-adrenoceptor activity. Urapidil, a selective alpha 1-adrenoceptor antagonist, simultaneously displays central hypotensive activity which, unlike that of clonidine and related drugs, is not mediated by alpha 2-adrenoceptors. Urapidil is also a weak beta 1-blocker. It consists of one single molecule without stereoisomers and is therefore a true hybrid drug, combining two or more activities in the same molecule. Urapidil's obvious central hypotensive activity, which is caused by an unusual, so far unknown mechanism, is an interesting feature, which may contribute to the absence of reflex tachycardia.

hytrin drug 2017-04-06

Terazosin and tamsulosin are drugs currently used in the treatment of benign prostatic hypertrophy (BPH). The potency of these two alpha(1) receptor antagonists and that of prazosin to inhibit contractions induced by noradrenaline and the binding of [(3)H]-prazosin in human prostate and four different human arterial and buy hytrin venous vessels (saphenous and umbilical veins, renal and mesenteric arteries) was studied.

hytrin bph medication 2016-12-27

An in buy hytrin vitro culture of prostatic smooth muscle cells was established. This culture is likely to provide a powerful tool for elucidating the physiology and pathophysiology of prostatic smooth muscle.

hytrin highest dose 2017-10-04

The total effective rate was 86.3% (69/80), 61.3% (49/80) and 17.5% (14/80) respectively in combined therapy group, medicine group I and medicine group II, indicating that the curative effect in combined therapy group was superior to that in other groups (P < 0.01, P < 0.05), and it in medicine group I was superior to that in medicine group II (P < 0.01). The Chinese medicine syndrome score was markedly reduced in combined therapy group (P < 0.01), and there was no obvious change in other groups (both buy hytrin P > 0.05). Urinary albumin (UMA) and urinary protein in 24 hours were notably reduced in combined therapy group and medicine group I (all P < 0.01), and it was more obviously in combined therapy group than that in other groups (P < 0.01, P < 0.05). The blood pressure was markedly reduced in all groups (all P < 0.05) after treatment, and there was no significant change in indices of liver and kidney functions (all P > 0.05).

hytrin mg 2016-06-08

This study was designed to determine the role of changes in adrenergic activity in mediating the chronic cardiovascular, renal, and metabolic actions of leptin. Male Sprague-Dawley rats were implanted with catheters for mean arterial pressure (MAP) and heart rate (HR) measurements and IV infusions of either vehicle (n= 7) or alpha- and beta-adrenergic receptor antagonists, terazosin and propranolol (10 mg/kg/d; n= 8) throughout the study. After control measurements, murine leptin was infused IV (1.0 microg/kg/min) for 7 days along with vehicle or adrenergic antagonists, followed by a 7-day recovery period. Leptin infusion significantly reduced food intake in control rats from 22.6 +/- 0.8 to 10.6 +/- 0.4 g/d and, in adrenergic blockade rats, from 22.6 +/- 0.8 to 13.2 +/- 0.8 g/d. Fasting plasma insulin decreased from 48 +/- 10 to 5 +/- 2 microU/mL in control rats and from 51+/- 9 to 9 +/- 2 microU/mL in buy hytrin adrenergic blockade rats during leptin infusion. Leptin infusion did not significantly alter glomerular filtration rate in either group. MAP and HR increased by 6 +/- 1 mm Hg and 23 +/- 7 bpm after 7 days of leptin infusion in control rats. However, in adrenergic blockade rats, leptin infusion did not significantly alter MAP (-1 +/- 1 mm Hg) and decreased, rather than increased, HR (-23 +/- 8 bpm). These results indicate that leptin-induced increases in blood pressure and tachycardia are mediated by increased adrenergic activity and support the concept that leptin may be an important link between obesity, increased sympathetic activity, and hypertension. However, the chronic effects of leptin on insulin and glucose regulation do not appear to be altered by alpha- and beta-adrenergic receptor blockade.

hytrin open capsule 2017-09-28

The treatment of hypertension in the elderly can be safely achieved with low-dose diuretic therapy. Men with prostatism may benefit from peripheral alpha-blocking drugs. However, drugs such as doxazosin or buy hytrin terazosin may further lower blood pressure and at times may be associated with orthostatic hypotension, especially if diuretics are given concomitantly. Tamsulosin achieves relaxation of the smooth muscle of the prostate, as do terazosin and doxazosin, but without provoking changes in blood pressure, especially orthostatic hypotension. There appears to be no adverse interaction with any other antihypertensive medication or with low-dose diuretics. To manage such patients with hypertension and prostatism, hydrochlorothiazide 6.25 to 12.5 mg/day and tamsulosin 0.4 mg/day would be an adequate combination. Low-dose diuretics have been shown to be effective in both isolated systolic hypertension as well as fixed diastolic hypertension in the elderly. If other antihypertensives need to be added, then a low dose of a long-acting calcium-entry blocker, a central alpha-agonist (a transdermal clonidine for better compliance), an angiotensin-converting enzyme inhibitor (if renal vascular disease has been ruled out), or an angiotensin II receptor blocker, e.g., losartan or valsartan, should be considered.

hytrin 10 mg 2017-03-20

At baseline, no differences were evident in the two groups in terms of I-PSS, buy hytrin Qmax, PVR and BP. After eight weeks of treatment-although I-PSS and uroflowmetry parameters were not significantly different in the two groups-systolic and diastolic BP in the non-hypertensive control group were higher than in the hypertensive group (p= 0.001 and p=0.0100, respectively). Changes in I-PSS, uroflowmetry parameters, and BPs measured at week eight post- treatment commencement did not significantly differ between the two groups. Moreover, the addition of 5mg of terazosin to antihypertensives did not cause a significant reduction in either systolic or diastolic BP in either group.

hytrin dosage prostate 2016-03-21

Twenty-nine buy hytrin patients with current or past treatment with any systemic alpha-1ARA and 22 untreated controls.

hytrin renal dose 2015-08-22

Current data suggest that treatment-naïve and/or buy hytrin newly diagnosed patients appear more likely to respond than long-term, chronic refractory patients. Longer courses of treatment (12 weeks to 6 months) appear superior to shorter courses, and less selective agents appear superior to more selective alpha1 blockers. These observations outline important questions that must be answered to define optimal treatment strategies for patients with CP/CPPS.

hytrin bph dosage 2016-01-04

The description of 5alpha-reductase deficiency in male pseudohermaphroditism, characterization of type-1 and type-2 isoenzymes of 5alpha-reductase, and development of 4-aza steroid competitive inhibitors of 5alpha-reductase were milestones in the development of 5alpha-reductase inhibitors, a class of drugs approved for the treatment of symptomatic Zocor Tab 10mg benign prostatic hyperplasia (BPH). Stromal and epithelial hyperplasia in the region of the prostate that surrounds the urethra begins in the fourth decade of life and by the sixth decade, the prevalence is 50%. Benign prostatic hyperplasia is a frequent cause of lower urinary tract symptoms, urinary tract infection, and acute urinary retention requiring surgical intervention. Medical options for treatment of symptomatic BPH include 1) the 5alpha-reductase inhibitors finasteride and dutasteride, 2) the alpha1-adrenergic antagonists doxazocin, terazosin, tamsulosin, and alfuzosin, and 3) the combination of a 5alpha-reductase inhibitor and a alpha1-adrenergic antagonist. By inhibiting the production of dihydrotestosterone (DHT) locally within the prostate gland, 5alpha-reductase inhibitors have the effect of reducing prostate volume, improving lower urinary tract symptoms, increasing peak urinary flow, and decreasing the risk of acute urinary retention and need for surgical intervention. Alpha-1 adrenergic antagonists relax the smooth muscle of the bladder neck and prostate, thereby decreasing the resistance to urine flow and increasing peak urinary flow and improving lower urinary tract symptoms. The alpha1-adrenergic antagonists are effective in the short-term, and reduce clinical progression of BPH, but do not reduce the long-term risk of urinary retention or need for surgical intervention. The 5alpha-reductase inhibitors are effective in the long-term, especially in men with large prostates, and reduce the clinical progression of BPH, and further reduce the long-term risk of urinary retention and need for surgical intervention. The combination of a 5alpha-reductase inhibitor and a alpha1-adrenergic antagonist significantly reduces the clinical progression of BPH over either drug class alone.

hytrin generic price 2015-10-12

To develop and validate an Arabic version Zyrtec Recommended Dosage of the International Prostate Symptom Score (IPSS).

hytrin 2mg tablet 2016-11-04

Pharmacological management is the most common therapeutic approach for patients with benign prostatic hyperplasia and alpha-adrenoceptor antagonists are the most commonly prescribed initial treatment. Although all of the alpha-adrenoceptor antagonists produce similar improvements in symptom scores and urinary flow rates, they have different adverse effect profiles, especially with respect to the cardiovascular system. The older alpha-adrenoceptor antagonists, terazosin and doxazosin Strattera 100 Mg , were initially approved for the treatment of hypertension and are associated with higher rates of dizziness, syncope and hypotension than the newer agents, tamsulosin and alfuzosin. The older alpha-adrenoceptor antagonists are also involved in more interactions and have a greater number of precautions concerning their usage with other cardiovascular medications. Of the newer alpha-adrenoceptor antagonists, tamsulosin has a lower rate of dizziness than alfuzosin. However, both of these agents are superior to doxazosin and terazosin in that no dose escalation or titration is needed for them.

hytrin reviews 2015-08-02

To confirm the role of alpha1-adrenoceptor (α(1)-AR) in the spinal cord, we investigated the effect of intrathecal application of Myambutol Drug Class terazosin, a non-selective α(1)-AR blocker, on the micturition reflex, as well as the change of α(1)-AR subtypes mRNA in the lumbosacral spinal cord using spinal cord injury (SCI) rats.

hytrin 15 mg 2016-03-12

Extended-release (ER) alfuzosin hydrochloride is the most recently approved alpha-adrenergic receptor antagonist (AARA) for the management of symptomatic benign prostatic hyperplasia (BPH). Although new to the United States, alfuzosin has been available in immediate-release (IR Lipitor 25 Mg ) and sustained-release (SR) formulations in other countries for many years.

hytrin 5mg capsule 2017-10-04

Chronic administration of alpha 1-receptor antagonists is associated with loss of clinical efficacy, especially in congestive heart failure, although the mechanism is uncertain. To evaluate changes in venous alpha 1-adrenoceptor responsiveness during chronic alpha 1-adrenoceptor blockade, dose-response curves to phenylephrine and angiotensin II were constructed in 10 healthy subjects before, during, and after administration of terazosin 1 mg orally for 28 d. Terazosin initially shifted the dose-response curve of phenylephrine to the right, with a significant increase in ED50 for phenylephrine from a control value of 102 to 759 ng/min on day 1 of terazosin (P < 0.001). However, by day 28, the dose-response curve had shifted back towards baseline with an ED50 of 112 ng/min. After discontinuing terazosin, the ED50 for phenylephrine remained near the baseline value, indicating no evidence of supersensitivity to phenylephrine. There was no change in responsiveness to angiotensin II during the course of treatment with Tricor Drug Interactions terazosin. Plasma terazosin concentrations were stable throughout the period of drug administration. The mean Kd of terazosin was estimated as 11 +/- 15 nM in the first few days of treatment. This study demonstrates that pharmacological tolerance to the alpha 1-adrenoceptor blocking action of terazosin occurs in man and may be responsible for loss in efficacy with chronic therapy.

hytrin generic name 2017-02-09

The quinazoline based alpha1-adrenoceptor antagonists doxazosin and terazosin suppress prostate tumor growth via the induction of apoptosis and decrease in tissue vascularity. To assess the effect of alpha1- Prilosec And Alcohol blocker exposure on the incidence of prostate cancer we performed an exploratory, observational cohort study.

hytrin maximum dosage 2016-06-21

alpha-adrenergic Cymbalta Generic Canada antagonists can be effective in the treatment of sympathetically maintained pain.

hytrin 2mg capsules 2016-11-08

Quinazoline-based alpha1-adrenergic receptor antagonists may not act solely on smooth muscle contractility. Paracetamol 500 Mg We evaluated the in vivo effect of terazosin on the expression of caspase-3 in the rat ventral prostate.

hytrin starting dose 2017-09-30

The antihypertensive activity of terazosin, an investigational alpha 1-adrenergic-receptor blocker, and its effect on blood lipids were compared with placebo in a double-blind study. After a 3-week placebo baseline period, patients were randomized to receive terazosin (n = 22) or placebo (n = 16). The dose of terazosin was titrated over 2 weeks to a maintenance dosage of 10 mg once daily for 4 weeks. Antihypertensive efficacy was assessed: (1) at the end of the 24-hour dosing interval by comparing the average blood pressure (BP) after 3 and 4 weeks of maintenance therapy to the average BP after 2 and 3 weeks of placebo therapy, and (2) for 3 hours after drug ingestion at the final visit in comparison to the predose BP at that visit. At the end of the 24-hour dosing interval, 10 mg of terazosin reduced the mean supine systolic BP from 155.6 to 152.2 mm Hg and mean supine diastolic BP Diflucan 50mg Capsule from 101.9 to 99.0 mm Hg (p less than 0.05). During the 3 hours after drug ingestion, mean supine systolic and diastolic pressures decreased maximally from 151.8 to 142.7 mm Hg (p less than 0.05) and from 99.5 to 91.0 mm Hg (p less than 0.05) respectively. No supine BP reduction differed significantly from the placebo response. During terazosin therapy there was a nonsignificant increase in mean body weight of 1.4 +/- 2.9 kg and no change in blood lipids. Thus the drug demonstrated greater antihypertensive activity 1-3 hours after ingestion than at the end of the 24-hour dosing interval.(ABSTRACT TRUNCATED AT 250 WORDS)

hytrin tablets 2015-05-16

ARR was 100.00+/-48.65 (14.19-285.16) pg/ml vs ngxml-1xh-1 in patients with essential hypertension and 699.33+/-213.33 (185.8-2150) pg/ml vs ngxml-1xh-1 in patients with adenoma/hyperplasia. ARR value was greater than 240 in 42 out of 45 patients (93.3%) with adenoma/hyperplasia and was less than 240 in 59 out of 65 (90.7%) patients with essential hypertension. We used ARR 240 as the cut-off threshold for screening primary aldosteronism in Singulair Typical Dosage another 178 hypertensive patients and ARR was greater than 240 in all 15 patients with confirmed primary aldosteronism.

hytrin terazosin dosage 2017-03-18

Antidepressant-induced excessive sweating (ADIES) occurs in 5% to 14% of patients taking antidepressants, usually persists throughout treatment, and causes subjective distress and functional impairment. We conducted the first clinical trial of any treatment for ADIES.

hytrin tablets 2mg 2017-01-05

to evaluate the efficacy, safety and tolerability of drugs used for treatment of LUTS in older persons, a systematic review was performed. Papers on clinical trials and summaries of individual product characteristics were analysed regarding efficacy and safety in older persons (≥65 years). The most frequently used drugs were selected based on current prescription data. An interdisciplinary international expert panel assessed the drugs in a Delphi process.

hytrin user reviews 2016-04-24

We conclude that alpha1-adrenoceptor antagonist pharmacokinetics can be monitored by radioreceptor assays in a subtype-selective manner. Tamsulosin and terazosin exhibit subtype selective receptor binding ex vivo. The discordance between terazosin blood levels as determined by h.p.l.c. and radioreceptor assay at late time points indicates the possible involvement of metabolites in in vivo terazosin effects.