Malegra 50 mg is a medication used to treat erectile dysfunction (ED). It contains sildenafil citrate, a PDE5 inhibitor that helps increase blood flow to the penis during sexual stimulation. Before buying Malegra 50 mg, there are several important considerations to ensure safety and effectiveness. Check for drug interactions. Malegra should not be taken with nitrate medications (often used for chest pain) because the combination can cause a dangerous drop in blood pressure. Some blood pressure medicines, alpha-blockers, and recreational drugs can also interact with sildenafil.