Kamagra 100mg can be used to treat impotence in men. The drug contains an ingredient called sildenafil citrate, which increases blood flow to the penis and relaxes the muscles. This medicine is useful for men above 18 years of age. The drug can be used at least 30-40 minutes before intercourse and enjoy a satisfactory erection. The effect of this medicine lasts for 36 hours. Using this medicine improves your sex life. Cold drinks or alcohol should not be consumed while taking this medicine as it slows down the effect of the medicine. This drug is more effective on an empty stomach.