Sildigra is a medication used to treat erectile dysfunction (ED) in men. It helps increase blood flow to the penis during sexual arousal, allowing for a firm and lasting erection necessary for sexual activity. Sildenafil in Sildigra blocks the enzyme PDE5, which breaks down cGMP. By inhibiting this enzyme, the medication helps maintain high cGMP levels, prolonging the erection during sexual activity. Common side effects of Sildigra may include headache, flushing, nasal congestion, dizziness, and indigestion.