Kamagra Onlineis an over-the-counter medication with sildenafil citrate as its active ingredient. It works by inhibiting the PDE5 enzyme. This results in increased blood flow to the penile area and prolonged erection. Kamagra is also used as an emergency supplement for when ejaculate fails. Although Kamagra is available in generic form online, you can still get a prescription if you want to buy it. However, some people with certain medical conditions should not use this treatment. For these reasons, you must consult your doctor before you start using it.