Metoprolol
"I took toprolol as a kid for a type of heart Failure. My doctor said it was same as what athletes get at age 29 I had been switched to Metoprolol 50mg once daily. After a few years a new doctor took me off of it and I began jumping awake gasping for air. I was diagnosed with severe sleep apnea and put on a CPAP. It never helped I Kept having it, turned up until the pressure was wide open. but still I jumped awake at nights. My doctor was beside himself with what to do and finally I was placed back on the Metoprolol 50Mg and in two weeks my sleep Apnea disappeared."