Used primarily to treat erectile dysfunction (ED) in adult men. It works by increasing blood flow to the penis during sexual stimulation, helping men achieve and maintain an erection. Avanafil belongs to a class of medications called phosphodiesterase type 5 (PDE5) inhibitors, which block the enzyme responsible for regulating blood flow in the penile tissues. It is known for its rapid onset of action, often effective within 15 to 30 minutes after ingestion, making it a preferred option for those seeking quicker results compared to other ED medications. It is taken on an as-needed basis, typically before sexual activity, and its effects can last for several hours. Not intended for daily use and should be used under medical supervision, especially in individuals with cardiovascular conditions or those taking nitrates.