Malegra tablets contain sildenafil citrate, a medication used to treat erectile dysfunction (ED) in men. To use Malegra safely and effectively, it is important to follow medical advice and understand proper usage guidelines. Possible side effects may include headache, flushing, dizziness, indigestion, nasal congestion, and temporary vision changes. Seek medical attention for serious symptoms such as chest pain, sudden vision or hearing changes, or an erection lasting more than four hours.