Atenolol/metoprolol: Atenolol is metabolized in kidney. Metoprolol is metabolized by liver. So, if there is a dysfunction of either organ, then would prefer using the other beta blocker. Atenolol has a variable amount of activity, so if taken once daily, may not last full 24hr. For most cardiovascular conditions, metoprolol is typically preferred. It comes in a twice daily (Lopressor) or once daily (Toprol XL)
Answered 5/4/2017
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