Buy Kamagra online medication to begin working, sexual desire provides the necessary push. When a person is sexually aroused, the drug begins to function. First, PDE-5 enzyme activity is inhibited by sildenafil; conversely, cGMP enzyme activity is increased, leading to the release of nitric oxide. 

In order to facilitate rapid blood circulation, nitric oxide relaxes the muscles and blood vessels around the penis. In order for the heart to properly carry out its blood circulation role without being under pressure to do other activities, the lungs and arteries are also relaxed.