Men who are taking nitrates or nitroglycerin Those with hypotension Men who have heart disease or heart failure ED can be the first sign of other health conditions, including cardiovascular disease and diabetes. More serious side effects may include a drop in blood pressure or an erection that lasts longer than four hours. Those with a history of blood pressure or heart issues, hormonal imbalances, mental health issues, and diabetes should consult their doctor before trying PDE5 inhibitors. This is important for your overall health and safety, as certain medications can negatively interact with each other or cause existing conditions to worsen. Online telehealth services like Lemonaid offer you both safety and convenience. Some services offer a subscription option where they’ll send your medications every month at a discount. It depends on the platform and insurance provider.Generic Viagra. Sildenafil. Switch to brand medication. info_outlined. Used for Erectile Dysfunction. MORE expand_more. Check your prescription. Prescription mg . You may already know most of the names: Cialis, Levitra, Staxyn, Stendra, Viagra. Learn more about these medications that can help men with erectile dysfunction get and keep . Viagra, Cialis, Levitra, and Stendra are oral medications used to treat erectile dysfunction (ED). You may also know them by their generic names: sildenafil .