Vidalista black 80 mg is a prescription drug that is used to treat erectile dysfunction in men.This drug prolongs the erection process during intercourse. This drug is useful in speeding up the blood circulation in the penis. The effect of this medicine can last for 4 to 6 hours. This medicine should be taken only once a day. This medicine should be taken on prescription as per the advice of the doctor. So visit our store – vidalista.us.