Carbodenafil Products | Cleanchem - Carbodenafil is a phosphodiesterase type 5 (PDE5) inhibitor used in the treatment of erectile dysfunction. It works by increasing blood flow to the penis, allowing for an erection in response to sexual stimulation. Carbodenafil is similar to sildenafil (Viagra) but may have a longer duration of action. Common side effects include headache, dizziness, and visual disturbances.