Verywell recognizes that some people who identify as women or men do not have the same anatomy as described in this article. There were highly statistically significant improvements on the two principal IIEF questions frequency of successful penetration during sexual activity and maintenance of erections after penetration on VIAGRA compared to placebo. In healthy male volunteers, there was no evidence of a clinically significant effect of azithromycin mg daily for 3 days on the systemic exposure of sildenafil or its major circulating metabolite. Soon, these are expected to flood the market, as manufacturers jostle for a slice of the pie. In these studies, involving about patients, analyses of patient diaries showed no effect of VIAGRA on rates of attempted intercourse about 2 per week , but there was clear treatment-related improvement in sexual function: per patient weekly success rates averaged 1.Viagra can interact with erythromycin (Ery-Tab), which is another antibiotic. Viagra can also interact with certain antifungal drugs, including ketoconazole and itraconazole (Sporanox, Tolsura). Title. It’s simply the unbranded version of Viagra. Worried airport security will give me hassle so am toying with the idea of just buying it out there. Cheers. Viagra (sildenafil) and cost. Viagra (sildenafil) is a brand-name oral tablet prescribed for erectile dysfunction. The cost of the drug with and without insurance can depend on several factors.