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Sildenafil citrate's chemical formula is C22H30N6O4S. It contains the same active ingredient as Viagra; the phosphodiesterase type 5 (PDE 5) inhibitor Sildenafil. Drinking alcohol decreases the blood flow to your penis, making it harder to get and keep an erection. The study involved a group of 38 consecutively studied patients with clinical and radiological evidence of idiopathic NPH, for whom a frontal brain biopsy was obtained. It is important to avoid nitroglycerin while taking these medications, but work is being done to develop a similar medication that can be taken with nitroglycerin.

Effects of VIAGRA on Blood Pressure Single oral doses of sildenafil (100 mg) administered to healthy volunteers produced decreases in sitting blood pressure (mean maximum decrease in systolic/diastolic blood pressure of 8. Furthermore, it was only possible that this side effect was related to treatment and a causal relationship to Viagra was uncertain.

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Stepwise increase in alpha-blocker dose may be associated with further lowering of blood pressure when taking a PDE5 inhibitor. Food and Drug Administration (FDA), for the treatment of erectile dysfunction. The higher a woman's testosterone levels, the researchers also found, the more likely a positive treatment response occurred, regardless of group assignment.

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More than 2 units of alcohol will increase the risk of negative side effects from taking Viagra and will make it more difficult to maintain an erection Dosage. For people with pulmonary veno-occlusive disease (PVOD): Taking this drug may worsen your heart function. A: Although Viagra (sildenafil) does not directly interact with coumadin, Betapace (sotalol), Lanoxin (digoxin), or enalapril, it should be used cautiously in patients with underlying heart conditions.

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Female Viagra works by relaxing smooth muscles of the blood vessels located in and around the female genitalia. When your doctor prescribes a new medication, be sure to discuss all your prescription and over-the-counter drugs, including dietary supplements, vitamins, botanicals, minerals, and herbals, as well as the foods you eat. Patients should be stable on alpha-blocker therapy prior to initiating a PDE5 inhibitor. One of the less common side effects associated with Viagra is a medical emergency known as priapism. Most, but not all, of these patients had preexisting cardiovascular risk factors. You also may want to try Cialis (tadalafil) or Levitra (vardenafil) if your physician feels it may help better. Do not take Viagra if you are also using a nitrate drug for chest pain or heart problems, including nitroglycerin, isosorbide dinitrate, isosorbide mononitrate, and some recreational drugs such as "poppers". Thereafter, VIAGRA 100 mg or matching placebo was administered simultaneously with doxazosin 4 mg (14 subjects) or doxazosin 8 mg (6 subjects) in standard crossover fashion. Pharmaceutical companies must pay for years of clinical trials before a drug can be deemed safe by the FDA to be on the market. The tested organs, with the exception of pancreas, did not show any enzymatic activity of neutral proteinases. Impairment of Fertility There was no impairment of fertility in rats given sildenafil up to 60 mg/kg/day for 36 days to females and 102 days to males, a dose producing an AUC value of more than 25 times the human male AUC. Tell your doctor about all your current medicines and any you start or stop using, especially: drugs to treat high blood pressure or a prostate disorder; an antibiotic - clarithromycin, erythromycin, or telithromycin; antifungal medicine - ketoconazole or itraconazole; or medicine to treat HIV/AIDS - atazanavir, indinavir, ritonavir, or saquinavir; nitrates; medications used to treat pulmonary artery hypertension.