Modula 5 mg contains tadalafil 5 mg, a PDE5 inhibitor marketed by Sun Pharmaceutical Industries. It is used to treat erectile dysfunction (ED) and symptoms of benign prostatic hyperplasia (BPH) in men. For ED, tadalafil increases blood flow to the penis during sexual stimulation, helping achieve and maintain an erection. It does not increase sexual desire or produce an erection without arousal. The 5 mg strength may be prescribed for once-daily treatment, depending on the individual's needs and medical assessment.