Tadagra Prof 20 mg should be taken orally, with or without food, approximately 30 minutes to 1 hour before anticipated sexual activity. The recommended dosage is one tablet per day, and it should not be taken more than once within a 24-hour period. Avoid consuming large meals or high-fat foods before taking tadalafil, as this may delay its onset of action. Tadalafil works by inhibiting the PDE5 enzyme, leading to increased levels of cyclic guanosine monophosphate (cGMP). This results in the relaxation of smooth muscles and dilation of blood vessels in the penis, facilitating an erection in response to sexual stimulation.