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. You take one 2. If you start experiencing erectile dysfunction after beginning BP medication, talk to the prescribing doctor. However, others work on a cash-pay basis and don’t partner with insurance companies. These small differences affect the way each medication works, such as how quickly it takes effect and wears off, and the possible side effects.Find the most popular and affordable Erectile Dysfunction medication. Save with or without insurance on brand and generic alternatives used to treat Erectile Dysfunction. 5 rows · There are four types of ED pills on the market, including sildenafil and tadalafil, often known. Sildenafil (Viagra). Tadalafil (Cialis). Vardenafil. These medicines are called PDE5 inhibitors. They enhance the effects of a chemical the body makes that relaxes .