First approved for use in the 1950s, beta blockers have been called the first "blockbuster" drug ever developed in the US. Today, millions of people take them for everything from heart disease to stage fright, from treating glaucoma to preventing migraines. But not all beta blockers are created equal. Studies show, over time, taking an older class of beta blockers can substantially increase your risk of developing diabetes. Dr. Ragavendra Baliga, a cardiologist at the Ohio State University Wexner Medical Center is helping to lead the charge to do away with the older versions of this popular medicine.