- After consuming Kamagra Oral Jelly, it rapidly assimilates in the bloodstream. The series of chemical changes that take place correct the lack of blood supply in the body. The enzyme that hampers and reduces the blood flow in the entire body, including the male phallus, gets suppressed. This enzyme is phosphodiesterase type 5 (PDE5). Post this effect there is a considerable increase in the cGMP and Nitric Oxide levels that makes the arteries dilate and erectile tissue relax. Consequently, the blood flow increases in the male reproductive organ. Hence, men experience hard erection during sexual stimulation.