Metoprolol Succ ER – Uses, Side Effects, and Warnings Last Updated: February 28, 2022 by Market Health Beauty Team - 4 minutes read Metoprolol Succ ER or Metoprolol Succinate ER is actually a beta-blocker. It affects blood flow and heart conditions. Here are The Metoprolol Succ ER – Uses, Side Effects, and Warnings