Per Drugs.Com: 'metoprolol and Diphenhydramine may have additive effects in lowering your blood pressure. You may experience headache, dizziness, lightheadedness, fainting, and/or changes in pulse or heart rate. These side effects are most likely to be seen at the beginning of treatment, following a dose increase, or when treatment is restarted after an interruption.' many people take them together even w ^ bp.
Answered 1/8/2018
4.4k views
Yes: Toprol (metoprolol) and Diphenhydramine have no drug interactions.
Answered 1/8/2018
4.4k views
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