Feixiong Cheng, PhD, Cleveland Clinic (IMAGE) Cleveland Clinic Caption New Cleveland Clinic-led research points to sildenafil (Viagra) as a potential treatment for Alzheimer’s disease. Credit Cleveland Clinic Usage Restrictions None License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.