kamagra is used to treat erectile dysfunction (ED) in men. Use the medicine only if you are 18 years or older. It contains sildenafil citrate as its active ingredient, which belongs to a class of drugs known as phosphodiesterase type 5 (PDE5) inhibitors. Increases in blood. Usually take the medicine 1 hour or 30 minutes before sexual intercourse. This medicine works to eliminate the problem of men. You take the medicine with food, so it has more effect on a full stomach. You take the medicine with 1 glass of water. Take this medicine as per the doctor's advice.