Sildigra Black Force 200 mg is typically taken orally with a full glass of water, approximately 30-60 minutes before sexual activity. Avoid taking more than one dose per day. Sildenafil citrate in Sildigra Black Force 200 mg works by increasing blood flow to the penis during sexual stimulation, leading to an erection. It's important to note that sexual arousal is still required for the medication to be effective.