Kamagra 50 can be used to effectively treat erectile dysfunction. This medicine contains the active ingredient sildenafil which increases blood flow to your penis, helping you get and maintain an erection when you are aroused. This medicine is taken 30 minutes before sexual intercourse. With this medicine you can enjoy sexual activity for 4 to 5 hours. One pill is taken in a day. Take this medicine with water. Women should not take this medicine.