Tadagra Prof 20 mg is a medication used to treat erectile dysfunction (ED) in men. It contains tadalafil as its active ingredient. Tadalafil is a phosphodiesterase type 5 (PDE5) inhibitor, similar to sildenafil and vardenafil. It works by increasing blood flow to the penis, facilitating the ability to achieve and maintain an erection during sexual stimulation. Tadalafil, including Tadagra Prof 20 mg, has a longer duration of action compared to some other medications for ED. It can be effective for up to 36 hours, providing a more extended window of effectiveness.