Kamagra gold 100 medicine is useful for men with ED problems. The active ingredient in this medicine is Sildenafil Citrate, which works to relax the muscles by increasing the blood volume in the penile arteries. A strong erection can be enjoyed by using this medicine 1 hour before intercourse. This medicine can be taken before or after food. The effect of this medicine lasts for about 36 hours. This medicine should be used only on the advice of the doctor.