As a pharmacy medicine, patients need to have a consultation with a pharmacist in person when buying in store. When choosing one, tell your doctor or other health care professional what your preferences are, such as cost, ease of use, how long the drug’s effects last and side effects. Some examples of nitrates are nitroglycerin Nitro-Dur, Nitrostat, others , isosorbide mononitrate Monoket and isosorbide dinitrate Bidil. As with sildenafil, a high-fat meal or alcohol keep the body from absorbing it as quickly. You are here: Home Newsroom News Boots launches its first own brand ED treatment containing active ingredient Sildenafil Boots launches its first own brand ED treatment containing active ingredient Sildenafil 13 June News Healthcare Boots Sildenafil will be sold as a pharmacy medicine at boots. You can take this medicine with or without food 30 minutes before sex, depending on the dose.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 . Viagra Connect is available as an over-the-counter medicine, whereas Viagra must be prescribed. What strengths of Viagra are available from the Boots Erectile Dysfunction . VIAGRA connect is available in pharmacy and online from Boots exclusively for a two-week period, prior to being made available from wider pharmacies. Pfizer has announced that .