Malegra 120 mg is marketed as a sildenafil-containing treatment for erectile dysfunction (ED). Sildenafil belongs to the PDE5 inhibitor class and works by increasing blood flow to the penis during sexual stimulation, helping achieve and maintain an erection. However, 120 mg is higher than the usual recommended maximum single dose of sildenafil for ED, which is 100 mg. Taking more sildenafil does not necessarily produce better results and may increase the risk of side effects. Therefore, Malegra 120 mg should not be taken without medical advice.