An inherited eye disease that affects the retina. You can test a medication using a sample to see if any side effects are tolerable and if the advantages outweigh the risks. By investigating these possibilities, people can get the prescription drugs they need to treat their ED issues without having to pay a high price. Sex Med. Dubai Visa.A Florida man has been charged with several felonies and a misdemeanor after police say he threatened a CVS pharmacy, asking for “all bottles” of Viagra, Adderall and other drugs. Is there an over-the-counter Viagra? Viagra is only available with a prescription in the United States, Canada, and most other countries. Viagra is sold under the generic name sildenafil.  · Sildenafil. Generic name: sildenafil (oral) [ sil-DEN-a-fil ] Brand names: Revatio, Viagra. Drug classes: Agents for pulmonary hypertension, Impotence agents. Medically reviewed by Kaci Durbin, MD. Last updated on Uses. Warnings. Before taking. Dosage. Side effects. Interactions. FAQ. What is sildenafil?