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Viagra is actually one of the most counterfeited drug in the entire world. In one study, 80% of websites selling Viagra were not selling the real drug but fakes. To stay healthy and avoid these harmful substances and potential adverse consequences, only obtain Viagra at your local pharmacy or through an accredited online source. Understanding Sildenafil (Viagra) Sildenafil is a drug that falls under phosphodiesterase type-5 (PDE5) inhibitors. It works by relaxing the blood vessels in the penis, allowing for increased viagra pills cvs pharmacy Sildenafilrelaxes muscles of the blood vessels and increases blood flow to particular areas of the body. Sildenafil under the name Viagra is used to treat erectile dysfunction(impotence) in men. Another brand of sildenafil is Revatio, which is used to treat pulmonary arterial hypertensionand improve exercise See more Brand names for sildenafil include Viagra, Revatio, and Liqrev. The cost for sildenafil 100 mg oral tablet is around $10 for a supply of 2 tablets, depending on the pharmacy you Sildenafil under the name Viagra is used to treat erectile dysfunction (impotence) in men. Another brand of sildenafil is Revatio, which is used to treat pulmonary arterial hypertension and improve exercise capacity in men and women. Do not take Viagra while also taking Revatio.

Sildenafil is used to treat male sexual function problems (impotence or erectile dysfunction-ED). In combination with sexual stimulation, sildenafil works by increasing blood flow to the penis to Therefore, sildenafil acts in various different disorders. It reduces, for example, pulmonary and systemic pressure, 6тАУ10,17 relaxes saphenous veins and pectoral arteries, 18 and increases flow-mediated forearm On the basis of a safety database comprising thousands of men with ED, sildenafil has demonstrated minimal adverse effects in men with stable ischemia, hypertension, and/or severe coronary artery disease. Sildenafil has modest effects on hemodynamic variables and has been shown to increase coronary artery flow reserve. viagra for circulation problems This prospective study examined the effects of low dose (20 mg tid for 12 weeks) and high dose (60 mg tid from 12тАУ24 weeks) sildenafil on cardiovascular function at rest and with submaximal and peak exercise In humans, sildenafil improves cardiopulmonary exercise capacity in heart failure patients with acute or long-term (12 weeks) treatment, which may involve more than effects on the pulmonary vasculature Citation [37,38]. You should not use Viagra if you are allergic to sildenafil, or: if you take other medicines to treat pulmonary arterial hypertension, such as riociguat (Adempas). if you take nitrates. Do not take Viagra if you are also using a nitrate drug for chest pain or heart problems. This includes nitroglycerin, isosorbide dinitrate, and isosorbide

Viagra is a drug that helps treat erectile dysfunction. It improves blood flow to the penis, and its effects can last for up to 4 hours, although the effect will likely be stronger after 2 hours.