Tadalista 20 is a very effective drug used to treat male impotence. The main ingredient in this medicine is tadalafil. This drug helps relax the muscles and increase blood flow so that a strong erection can be achieved and maintained during erection. It is advised to take this medicine one hour before planned intercourse. This medicine should not be chewed. This medicine is only useful for men aged 18 and above. If you want to see a very quick effect of this medicine, then you can take this medicine on an empty stomach and take it with light food. It is imperative to drink plenty of fluids after taking this medicine. This medicine should be used as per the doctor's advice.