Tadarise Black 80 mg is an oral medication used to treat erectile dysfunction (ED) in men. Its active ingredient is tadalafil, a phosphodiesterase‑5 (PDE5) inhibitor. Tadalafil works by relaxing the smooth muscles and widening blood vessels in the penis, which improves blood flow during sexual stimulation and helps achieve and maintain an erection. One of the key features of Tadarise Black 80 is its long‑lasting effect — it can remain effective for up to 36 hours after a single dose, which gives users a broader window of opportunity for sexual activity compared with many other ED drugs.