Atenolol

In medicine, metoprolol is a adrenergic beta-antagonist that is a "selective adrenergic beta-1-blocking agent with no stimulatory action. It's binding to plasma albumin is weaker than alprenolol and it may be useful in angina pectoris, hypertension, or cardiac arrhythmias." It is also used for heart failure.

Metabolism
It is not metabolized by cytochrome P-450 2D6 allele.

Dosage
For healthy adults, the starting dose is 50 mg orally once daily and the maximum dose is 100 mg orally once daily.