Vidalista is an impotence drug containing tadalafil – the active ingredient used in today's most frequently prescribed ED medications. These drugs include tadalafil, which treats ED by increasing blood flow to the penis so a man can get an erection faster and longer. If they promote any benign signs. The most recommended dose of this medicine is once a day. A portion should not be taken more than once in 24 hours. This medicine should be taken once a day with a full glass of water. It can be taken before or after meals.