Food and Drug Administration has approved fifteen drug manufacturers to market generic sildenafil in the United States. In addition, ED is extremely common. Recent heart or blood vessel problems. It does not have to be taken around the time of sexual activity. These include itraconazole Sporanox, Tolsura , ketoconazole Extina, Ketozole, others and ritonavir Norvir. Healthcare providers have experience talking about ED and providing treatment options without any judgment or shame.Valid at all major chains including Walgreens, CVS Pharmacy, Target, WalMart Pharmacy, Duane Reade and 65, pharmacies nationwide. No manufacturer promotions could be found for this medication. Patient Assistance & Copay Programs for Tadalafil. Medicine Cabinet Organizer. Personal Care. Shop for Over-the-Counter Medicines in Medicine Cabinet. Buy products such as AZO Urinary Pain Relief Maximum Strength, Fast relief, #1 Most Trusted Brand, 24 Tablets at Walmart and save. Generic Viagra (sildenafil) is available as a , , , and milligram (mg) pill and in liquid form. It’s meant to be taken as needed — about an hour before sex — but shouldn’t be.