Malegra 120 mg is a medication primarily used to treat erectile dysfunction (ED) in men. Its active ingredient is Sildenafil Citrate, a phosphodiesterase type 5 (PDE5) inhibitor. This drug works by increasing blood flow to the penis during sexual stimulation, helping men achieve and maintain an erection suitable for sexual activity. It does not cause spontaneous erections; sexual arousal is required for the medication to be effective.