Vidalista 10 mg is a medication used to treat erectile dysfunction (ED) — a condition where men find it difficult to achieve or maintain an erection firm enough for sexual activity. The active ingredient in Vidalista 10 mg is Tadalafil, which belongs to a class of drugs known as phosphodiesterase type 5 (PDE5) inhibitors. Tadalafil increases blood flow to the penis by relaxing the blood vessels, enabling a firm and sustained erection when a man is sexually stimulated. It does not cause an erection on its own; sexual arousal is still required for it to work effectively.