The U. You deserve to put ED behind you and to enjoy your sex life. Patients should always ask their doctors for medical advice about adverse events. These PDE5 inhibitors may cause headache, flushing, drop in blood pressure, or other adverse effects. But there are special entities and people who can mail prescription drugs. These are programs designed to collect back unused or unwanted medicines from the public for safe drug disposal. In recent times, online pharmacies and mail-order pharmacies are becoming more popular.Last updated: June 14, If you’re looking for a less costly Viagra, you might want to ask your doctor about sildenafil. It’s the active ingredient in both branded Viagra and the drug. Lemonaid can prescribe sildenafil (generic Viagra), tadalafil (generic Cialis), and vardenafil (generic Levitra). You can get a prescription online following a quick and easy visit with a member of our clinical team. Then the Lemonaid pharmacy, licensed in all 50 states, will ship your meds directly to your door in discreet packaging. chevron_right. Viagra. Compare prices and print coupons for Sildenafil (Generic Revatio and Viagra) and other drugs at CVS, Walgreens, and other pharmacies. Prices start at .