Viagra is a brand-name medication, and the tablets have a distinct blue appearance and come in a recognizable box. Answer: In short, the drug in Viagra, Sildenafil, dilates blood vessels at the entrance to the penis. This helps blood flow into your penis more easily, and helps you get firmer erections that last for longer. How safe is Viagra? Can women take Viagra? Tell us about your health and get expert advice from our clinicians. Some men prefer Viagra over the Sildenafil generic.Sildenafil Prices, Coupons and Patient Assistance Programs. Sildenafil is a member of the agents for pulmonary hypertension drug class and is commonly used for Erectile . El costo promedio de Viagra es de $ por cada 1 Tablet de MG, pero puedes usar los cupones de SingleCare para ahorrar en este precio y pagar solo $ por cada 30 . Viagra miligramos está a $ Sildenafilo miligramos está a $, más que doble del medio nacional de $ CVS también tiene un precio para Viagra en un .