There are many types of medications used to treat ED. Each drug works differently, but they all improve the sexual activity by stimulating blood flow to the penis. Vidalista 2.5 mg is an effective drug used to treat impotence in men. Tadalafil present in this medicine works by increasing blood volume in the arteries of the penis. This medicine should be taken only once in 24 hours otherwise it can harm the body. Use this medicine as advised by your doctor. If this drug is taken 1 hour before intercourse is planned, its effect is more pronounced during intercourse.