Sildigra is another brand of medication used to treat erectile dysfunction (ED), and it also contains the active ingredient sildenafil citrate. Like Viagra and other sildenafil-based products, Sildigra works by increasing blood flow to the penis, which helps men achieve and maintain an erection when sexually aroused. Take one tablet about 30 minutes to 1 hour before sexual activity, ideally on an empty stomach for faster absorption. Sildigra is effective for treating ED and is often used by men who need help with achieving or maintaining an erection.