Viagra is the most recognizable and well-known ED tablet. Refills: See if you can set up automatic refills or order as needed. People taking nitrates like nitroglycerin Nitrostat or isosorbide mononitrate Imdur should not take PDE5 inhibitors, as doing so could result in a dangerous drop in blood pressure. A phone or video consultation is sometimes required for legal purposes. Make sure to get an estimate of when you can expect your prescription in the mail. Common side effects include headache, facial flushing, indigestion, and dizziness. The most common symptoms of erectile dysfunction include difficulty achieving or maintaining an erection and reduced sexual desire.3 min read If you search “buy erectile dysfunction drugs” online, you’ll bring up nearly 22 million sites. You may find well-known ED drugs for sale, as well as many “natural” . Compare prices and print coupons for Sildenafil (Generic Revatio and Viagra) and other drugs at CVS, Walgreens, and other pharmacies. Prices start at $ Consumer Reports Best Buy Drugs shares how you might be able to get generic Viagra, known as sildenafil, at a much lower price.