When a guy is sexually aroused or unable to sustain an erection, he has erectile dysfunction, a condition in which the penis does not stiffen and expand. An element in vidalista black called Tadalafil aids in boosting blood flow to men's penile tissues. A man's body naturally produces an erection when he is sexually stimulated by increasing blood flow to his penis. This medication can be used with or without food. Do not break or chew this medication; instead, take it with water.