Revatio and other PDE5 inhibitors can help people with PH or chronic left heart disease who have a less than adequate score on a measure of blood-pumping ability known as ventricular ejection fraction. PDE5 INHIBITORS — There is no convincing evidence that any one PDE5 inhibitor is safer or more effective than any other. 1 Advertisements on Stendra's website imply that it has a faster onset of act