Kamagra 100Contains the active ingredient sildenafil, also known as blue tablets. It is a very effective drug for the treatment of erectile dysfunction (ED), also known as male impotence.Erectile dysfunction is a condition in which a man is unable to achieve and maintain a sufficient penile erection for s*xual intercourse and is primarily age-related. This is due to a decrease in blood flow that can be caused by physical problems such as accidents and illnesses and psychological problems such as anxiety, stress and despair.