vidalista black is a powerful medication that works to treat erectile dysfunction in men. It contains PDE-5 inhibitors that work to improve the blood flow in the penis. It also helps to relax the muscles in the body that tighten up after arousal. The medicine is available online at a drugstore called Bluemedex. It is important to follow the instructions for use of this medication. This includes not drinking alcohol or taking other medications that can affect the effectiveness of this drug.