You’ll soon start receiving the latest Mayo Clinic health information you requested in your inbox. The FDA recommends avoiding alcohol use if you take this drug. The primary measure in the principal studies was a sexual function questionnaire the International Index of Erectile Function – IIEF administered during a 4-week treatment-free run-in period, at baseline, at follow-up visits, and at the end of double-blind, placebo-controlled, at-home treatment. VIAGRA improved these aspects of sexual function: frequency, firmness and maintenance of erections; frequency of orgasm; frequency and level of desire; frequency, satisfaction and enjoyment of intercourse; and overall relationship satisfaction. Cialis and Viagra are equally effective. It shouldn’t be used more than once a day or more than eight times a month. The information provided is for educational purposes only and is not intended to replace discussions with a healthcare provider.According to an article by the New York Post, the average cost of a mg Viagra pill is $40 at most U.S. pharmacies. The degree of variation from one pharmacy to another is marked by a few dollars. In the above table, the lowest price for a day supply of mg pills is $ at Walmart. At the other end of the scale Rite Aid members. Compare prices and print coupons for Viagra (Sildenafil) and other drugs at CVS, Walgreens, and other pharmacies. Prices start at $ Viagra is absorbed quickly into your body. It can start working within 30 minutes, but it may take a couple hours for some people. However, one study on Viagra found that about 70% of men achieved erections in 30 minutes, and more than 80% of men achieved erections within 45 minutes. For most men, the effects of Viagra will start within .