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Other drugs for erectile dysfunction, such as avanafil, tadalafil, or vardenafil. A: Viagra (sildenafil) is classified as a phosphodiesterase 5 enzyme inhibitor. Warnings & Precautions WARNINGS Included as part of the PRECAUTIONS section. Your doctor will write the number of refills authorized on your prescription. This very rare adverse event occurs mainly in people with heart disease, hypertension, diabetes, high cholesterol, or pre-existing eye problems. In addition, N-desmethyl metabolite AUC and Cmax values significantly increased by 200% and 79%, respectively in subjects with severe renal impairment compared to subjects with normal renal function.

I was until I found out they probably were doing me no good. Pharmacist Sarah, PharmD Q: I recently suffered a mild stroke. Viagra is currently only available in brand name version and there has not been a date set for the release of its generic.

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A total dose of 40 mg sildenafil was administered by four intravenous infusions. Sildenafil at recommended doses has no effect in the absence of sexual stimulation. In the course of my research I found that Pfizer had consulted with quite a few experts about possible litigation down the line regarding Viagra. Do not take Viagra while also taking Revatio, unless your doctor tells you to. A: Viagra (sildenafil) must be used with caution in patients taking an antihypertensive medication. No overall differences in safety or efficacy were observed between older ( > 65 years of age) and younger ( < 65 years of age) subjects.

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The tissue temperature elevation 1 cm from the tip never exceeded 0. Sildenafil was not carcinogenic when administered to mice for 18-21 months at dosages up to the Maximum Tolerated Dose (MTD) of 10 mg/kg/day, approximately 0. If you have a medication that you place under your tongue when you feel chest pain, it is probably nitroglycerin, and should not be combined with Viagra or the other two erectile dysfunction medications, Cialis (tadalafil) and Levitra (vardenafil).

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Increased side effects can include low blood pressure or erections that last longer than normal. Phosphodiesterase-5 suppresses the effect of a neurotransmitter known as nitric oxide. You do not need to say why you want to talk to the pharmacist, just that you would like to have a quick word. Pharmacist Sarah, PharmD Q: I recently suffered a mild stroke. In addition, in most cases the problem for women is not with physical arousal but rather a lack of sexual desire. Michelle McDermott, PharmD Q: My urologist has prescribed 100 mg of Viagra for my erectile dysfunction. There are no controlled clinical data on the safety and efficacy of Viagra patients who suffered a myocardial infarction (heart attack), stroke, or life-threatening arrhythmia within the last 6 months. If you have any information on how Viagra effects the heart, can you include it in your reply. Feenstra J, vanDriePierik RJHM, Lacle CF, Stricker BHC "Acute myocardial infarction associated with sildenafil." Lancet 352 (1998): 957-8 16. Normal-pressure hydrocephalus (NPH) is a potentially treatable syndrome with abnormal cerebrospinal fluid dynamics. Viagra can decrease blood flow to the optic nerve of the eye, causing sudden vision loss. Have any of your heart medications been increased, especially ones that are known to cause erectile dysfunction, such as the beta blocker family, Tenormin (atenolol), Lopressor (metoprolol) and others?