Kamagra is a brand name for a medication that contains sildenafil citrate, which is the same active ingredient found in Viagra. Sildenafil is primarily used to treat erectile dysfunction (ED) in men. Here are some key points about the use of Kamagra: Erectile Dysfunction Treatment: Kamagra is primarily prescribed to men who have difficulty achieving or maintaining an erection. It works by increasing blood flow to the penis, helping to achieve and sustain an erection during sexual stimulation. Mechanism of Action: Sildenafil, the active ingredient in Kamagra, belongs to a class of drugs known as phosphodiesterase type 5 (PDE-5) inhibitors. It works by inhibiting the action of PDE-5, leading to increased levels of cyclic guanosine monophosphate (cGMP). This results in smooth muscle relaxation and increased blood flow to the penis during sexual arousal.