The active component of Viagra, sildenafil citrate, is included in the high-dose drug Cenforce 200. By increasing blood flow to the penis, it helps men get and keep an erection during sexual activity, which is its principal method of treating erectile dysfunction (ED). Thirty to sixty minutes prior to engaging in sexual activity, take one 200 mg tablet with a glass of water. Avoid mixing with recreational drugs or alcohol as this may enhance negative effects and decrease effectiveness.