Click Here To Buy Now Sildenafil 120 is another variant of Sildenafil Citrate, which is used to treat erectile dysfunction (ED) in men. It contains 120 mg of Sildenafil, which is a moderate dose compared to the higher-strength Sildenafil 200. Like other Sildenafil-based medications ,Sildenafil 120 works by improving blood flow to the penis during sexual arousal, making it easier to achieve and maintain an erection.