Severe heart failure (that required you to be in the hospital) orĪ history of slow heart beats that have caused you to faint.Īsthma, chronic obstructive pulmonary disease ( COPD), sleep apnea, or other breathing disorder ĭiabetes (taking Metoprolol Succinate ER may make it harder for you to tell when you have low blood sugar) You should not use this medicine if you are allergic to Metoprolol Succinate ER, or other beta-blockers ( atenolol, carvedilol, labetalol, nadolol, nebivolol, propranolol, sotalol, and others), or if you have:Ī serious heart problem such as heart block, sick sinus syndrome, or slow heart rate
