Provide a physical address and telephone number in the U. Purchasing from them, through your insurer, is as safe as using your local pharmacy. You’ll want to avoid the hundreds maybe thousands of rogue sites that claim to be online pharmacies, but really just want your money. Also, these drugs may not have been stored properly, such as in a warehouse without necessary temperature controls, which may cause the medicine to be ineffective in treating your condition. If you understand the reasons why most online pharmacies are not safe or legal, then you’ll better understand how to make a wise choice.An FDA investigation found that more than one-third of “dietary supplements” sold for ED actually contained prescription drugs, including sildenafil, the medicine in Viagra. Some . Orders were placed from 22 unique sites claiming to sell Viagra manufactured by Pfizer. Tablets received were assessed for chemical composition. Results: No site . Yes, it can be legal as long as certain rules are followed. Whether or not it is legal to purchase your prescription drugs online depends on various factors: your location, the .