Kamagra is a drug used to treat erectile dysfunction (also known as impotence) in men. This drug works by increasing blood flow to the male genitalia. It helps men to get or maintain an erection. It belongs to a group of medicines known as phosphodiesterase type 5 (PDE 5) inhibitors. It can be taken on an empty stomach or after a meal but will be more effective if taken on an empty stomach. Do not take this medicine if you have severe heart or liver problems, have recently had a stroke or heart attack, or have low blood pressure. Consult a doctor first.