Taking VIAGRA (sildenafil citrate)

Generic Viagra, known as sildenafil, is an alternative to the branded drug Viagra that can be used to treat erectile dysfunction (ED) and is available online at a fraction of the price. Sildenafil Citrate is the citrate salt form of sildenafil, an orally bioavailable pyrazolopyrimidinone derivative structurally related to zaprinast, with vasodilating and potential anti-inflammatory activities. Viagra and other erectile dysfunction (ED) medications. Because Viagra may interact with other medications for ED, doctors typically will not prescribe Viagra with these drugs. Examples include: alprostadil (Muse, Caverject, Caverject Impulse, Edex) avanafil (Stendra) tadalafil ; vardenafil (Staxyn) Viagra and alpha-blockers. Sildenafil citrate (Viagra) [I] and sildenafil base [II] are easily and unequivocally characterized by a set of physicochemical methods that include XтАРray diffractometry, infrared spectroscopy, and thermal analysis. chemical structure of viagra Sildenafil (Viagra) is taken by mouth to treat erectile dysfunction (ED).You take it only as needed, typically about an hour before sexual activity (but you can take it anywhere between 30 minutes to 4 hours before sex). Viagra increases the effects of the blood pressure lowering medications. It also increases the blood pressure lowering effects of nitrates, for example, isosorbide dinitrate (), isosorbide mononitrate (Imdur, Ismo, Monoket), nitroglycerin (Nitro-Dur, Transderm-Nitro) that are used primarily for treating angina.

Viagra (sildenafil) is a prescription drug that s used to treat erectile dysfunction (ED). The drug comes as an oral tablet. It s usually taken as needed about 1 hour before sexual activity. On average, Viagra lasts between 2 and 3 hours before its effects start to diminish. Viagra can last up to 5 hours or longer depending on your dosage, your body s metabolism, and other external

They’re often the first line of treatment for trouble getting or keeping an erection, called erectile dysfunction (ED). Oral medicines for ED usually work well and cause few side effects. The four main medicines taken by mouth for erectile dysfunction are: Avanafil (Stendra). Sildenafil (Viagra). Viagra is a brand name of sildenafil, a drug that relaxes blood vessels and treats erectile dysfunction. Learn about its uses, dosage, side effects, warnings, interactions, and more from Drugs.com. what is viagra made of Viagra is a pill that contains sildenafil citrate, a chemical that blocks the PDE5 enzyme in the penis. This allows cGMP, a molecule that relaxes the arteries, to 4.1 Nitrates. Consistent with its known effects on the nitric oxide/cGMP pathway [see Clinical Pharmacology (12.1, 12.2)], VIAGRA was shown to potentiate the hypotensive effects of nitrates, and its administration to patients who are using nitric oxide donors such as organic nitrates or organic nitrites in any form either regularly and/or intermittently is therefore contraindicated. Viagra is a pill that contains sildenafil citrate, a chemical that blocks the PDE5 enzyme in the penis. This allows cGMP, a molecule that relaxes the arteries, to build up and cause an erection.