The main function of the drug Tadarise 2.5 mg is to relax the muscles of the penis, and this drug contains tadalafil to maintain an erection. You should take this medicine 30-40 minutes before intercourse. A doctor should be consulted once before taking this medicine. Do not take fatty foods, soft drinks, or any kind of addiction after taking this medicine, as it slows down the effect of the medicine. You should avoid taking this medicine if you are taking other medications or have any kind of illness. The effect of this medicine usually lasts for 36 hours. This medicine should be used only after discussing it with your doctor.