They require a prescription for any controlled substance and have a licensed pharmacist to answer questions rather than support staff. Its effects often last for 4 to 5 hours. Rogue pharmacies are not licensed to sell in the United States and put you at risk of counterfeit or tainted drugs How Many Online Pharmacies Are There? This boosts blood flow and helps you get an erection from sexual activity. Severe liver disease. Medicines that block an enzyme called CYP3A4.Levitra 10 mg for Cheap Price Generic Viagra in Bulk for Wholesale Price $ – $ 2, Sale! Select options. Alternatives to Viagra Generic Viagra (Cenforce mg) – USA to . Some online pharmacies even offer non-prescription drugs at a discount. So, if you’re looking to transition your prescription purchases from a storefront location, we’ve . Generic Viagra (sildenafil) is an alternative to the branded Viagra drug that can be used for treating erectile dysfunction (ED). It’s now sold by many manufacturers, including online.