Kamagra 100 helps men get or maintain an erection. Kamagra 100 Tablet is a prescription drug used to treat erectile dysfunction and impotence in men. It works by increasing blood flow to the penis. It belongs to a group of drugs known as phosphodiesterase type 5 (PDE 5) inhibitors. Take this medicine with water but do not break or chew the claim. The effect of this medicine lasts for 4 to 6 hours. You can take this medicine before or after food.