Sildigra 100 mg contains sildenafil, a PDE5 inhibitor used to treat erectile dysfunction (ED) in adult men. It works by increasing blood flow to the penis during sexual stimulation, helping achieve and maintain an erection. Sildigra 100 mg is a prescription-strength product, so it should be used according to medical advice. Common side effects include headache, flushing, indigestion, nasal congestion, dizziness, and visual disturbances. These effects are often temporary, but persistent or severe symptoms should be discussed with a healthcare professional.