Avanafil 200 mg is a medication used to treat erectile dysfunction (ED) in men by improving blood flow to the penile tissues. It belongs to the class of phosphodiesterase-5 (PDE-5) inhibitors and works by relaxing blood vessels, allowing increased circulation during sexual stimulation to help achieve and maintain a firm erection. Avanafil is known for its fast onset of action, often beginning to work within 15–30 minutes, making it a convenient option for many men. The 200 mg dose is considered a higher strength that may be prescribed when lower doses are not sufficiently effective. Possible side effects may include headache, flushing, nasal congestion, dizziness, and back pain, and it should be used under proper medical supervision.