Kamagra 100 mg is a prescription drug that is available as a tablet. It is commonly used to treat erectile dysfunction and impotence in men. This medicine contains an ingredient called Sildenafil which helps to increase blood flow to the penis. This medicine is for men over 18 years of age. This medicine should be taken only once a day and should not be taken by women or children. The effect of this drug is seen in about 30 minutes. The effect of this medicine lasts for 4 to 6 hours so do not take this medicine frequently. Take this medicine as advised by your doctor.