Generic versions of sildenafil, vardenafil and tadalafil are available. It lasts 4 to 5 hours, or longer if you have mild to moderate ED. These include itraconazole Sporanox, Tolsura , ketoconazole Extina, Ketozole, others and ritonavir Norvir. They’re often the first line of treatment for trouble getting or keeping an erection, called erectile dysfunction ED. This boosts blood flow and helps you get an erection from sexual activity.The four main medicines taken by mouth for erectile dysfunction are: Avanafil (Stendra). Sildenafil (Viagra). Tadalafil (Cialis). Vardenafil. These medicines are called . A Florida man has been charged with several felonies and a misdemeanor after police say he threatened a CVS pharmacy, asking for “all bottles” of Viagra, . AdSkip The Pharmacy & Get Your ED Meds Delivered To Your Doorstep. Includes Online Dr Visit. Same FDA-Approved Meds, Way Lower Prices. Start Saving Now With Blink Health®.Service catalog: Free Home Delivery, Easy Refill Process, Transparent Pricing.