Extra Super Avana works by inhibiting a specific phosphodiesterase type 5 in the body. This increases the amount of cyclic guanosine monophosphate in the corpus cavernosum, which relaxes the smooth muscles and improves blood flow to the penis. It also increases the sensitivity of the penis to nitric oxide, which helps it achieve and maintain an erection. Its effectiveness begins to kick in within 15 minutes after consumption, and it can last for up to four hours.