If neither of those approaches works, then follow the steps below for finding a safe and legal pharmacy to order from. Are not licensed in the U. You can protect yourself and your family by being cautious when buying medicine online. Many online pharmacies may also be unregistered. Whether or not it is legal to purchase your prescription drugs online depends on various factors: your location, the pharmacy’s location, and whether or not a prescription is required.Orders were placed from 22 unique sites claiming to sell Viagra manufactured by Pfizer. Tablets received were assessed for chemical composition. Results: No site . The U.S. Food and Drug Administration warns that there are many unsafe online pharmacies that claim to sell prescription drugs at deeply discounted prices, often . 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.