Tadalafil, which is an ingredient in Tadarise 20, acts by increasing a man's penile blood flow during intercourse. By acting as a PDE-5 inhibitor, this medication stabilizes the cGMP enzyme's level. There are several dosages for this medication, and it is important to follow your doctor's prescription. This oral medication should be given 30 to 40 minutes before having intercourse, with a full glass of water. It is recommended to take the tablet whole, without crushing it first. Individuals under the age of eighteen are not permitted to use this medication. Alcohol or other beverages shouldn't be consumed with this medication.