Buy Cenforce 100 mg online (sildenafil citrate) is Known as a Blue pill. Sildenafil citrate helps to treat sexual impotence in men and also helps to increase blood flow in the penile to help a man get harder and keep a long-term erection. It is only can be taken with a doctor’s prescription. So before using this tablet first consult with your doctor. Around 30-60 minutes before your sexual intercourse you can take this tablet.