Otherwise healthy men treated with prescription drugs for erectile dysfunction had fewer heart-related problems than men who didn’t take the medications, a new study finds.

Known as PDE-5 inhibitors, the drugs include sildenafil (Viagra), tadalafil (Cialis), and vardenafil (Levitra, Staxyn). They work by relaxing artery walls and improving blood flow. Earlier research suggested these drugs may also reduce heart problems in men with diabetes or heart disease.