Verkkothis medication can put you at risk for serious side effects, such as dangerously low blood pressure, vision loss, and damage to the penis. Verkkoviagra is a prescription drug used to treat erectile dysfunction. Learn about the common, mild, and serious side effects it can cause and how to manage. Verkkoyour doctor or pharmacist can tell you more about the potential side effects of viagra. They can also suggest ways to help reduce side effects. What to ask your doctor. Viagra (sildenafil) is a prescription drug that’s used to treat erectile dysfunction (ed). Verkkooften dubbed the little blue pill, viagra (sildenafil) was the first phosphodiesterase 5 (pde5) inhibitor approved to treat erectile dysfunction (ed). Verkkoread on to learn more about the ed pills that are fda approved, what possible side effects to keep in mind, and where you can buy some of the.