Tadalafil belongs to a class of medications called phosphodiesterase type 5 (PDE5) inhibitors. It works by relaxing the smooth muscles in the blood vessels of the penis, allowing increased blood flow to facilitate an erection.

Erectile Dysfunction (ED): Tadalafil is FDA-approved for the treatment of erectile dysfunction, commonly known as impotence. It helps men achieve and sustain an erection by improving blood flow to the penis during sexual stimulation.

Improved Erection: Tadalafil helps men with erectile dysfunction achieve and maintain a firmer and longer-lasting erection when sexually stimulated.

Extended Duration: It's known for its relatively long duration of action compared to some other ED medications, with effects lasting up to 36 hours in some individuals. This earned it the nickname "the weekend pill."

Tadalafil is usually taken orally prior to sexual activity. Depending on the prescribed dose, it can be taken on-demand shortly before anticipated sexual activity or in a lower daily dose for continuous use.