A person who is suffering from impotence, where there is a problem in sustaining and achieving an erection during sexual intercourse, can use Kamagra 100 mg Tablet. However, it will only work if there is sexual arousal. You should take one tablet of Kamagra 100mg with a glass of water about an hour before sexual activity and without food. You should not take more than one tablet a day and only if you plan to have sex. Take this medicine as per your doctor's advice.