Tadalafil, the active ingredient in Tadaflo 5 mg, works by inhibiting the enzyme phosphodiesterase type 5 (PDE5), which leads to increased blood flow in the penis upon sexual arousal. This mechanism is similar to other ED medications like Viagra (sildenafil) and Levitra (vardenafil). Clinical studies demonstrate that tadalafil effectively improves erectile function, enhancing sexual satisfaction for many men. It is generally well-tolerated, with side effects typically including headaches, flushing, and nasal congestion.