Vidalista black 80 mg is very effective in treating erectile dysfunction in men. An ingredient called sildenafil citrate plays an important role in this medicine. This medicine increases the speed of blood in the penis. This gives the medicine a hard and long lift during intercourse. This medicine can last for 4 to 6 hours. Alcohol or cold drinks should not be taken while taking this medicine. This medicine should be taken only on the advice of a doctor. So visit our store – vidalista.us.