Malegra 120 mg is a high-strength erectile dysfunction (ED) medication that contains sildenafil, a PDE5 inhibitor. It is designed for men who do not achieve satisfactory results with lower doses such as 25 mg, 50 mg, or 100 mg. Sildenafil works by relaxing blood vessels and increasing blood flow to the penis during sexual stimulation, helping to achieve and maintain a firm erection. Sexual arousal is required for it to be effective; it does not cause automatic erections.