Tadarise 5 mg contains tadalafil, a phosphodiesterase type 5 (PDE5) inhibitor used to treat erectile dysfunction (ED) in adult men. Tadalafil works by increasing blood flow to the penis during sexual stimulation, helping some men achieve and maintain an erection. The 5 mg strength is commonly used as a once-daily tadalafil dose for ED and may also be prescribed for certain men with benign prostatic hyperplasia (BPH), depending on the product and local approval.