No Clinically Significant Interaction Between Xarelto and Metoprolol
Xarelto (rivaroxaban) does not have a clinically significant drug interaction with metoprolol, and these medications can be safely used together. Metoprolol is a beta-blocker that does not affect the CYP3A4 enzyme system or P-glycoprotein (P-gp) transporters that are responsible for rivaroxaban metabolism.
Why This Combination Is Safe
Rivaroxaban's drug interactions occur specifically through two pathways 1:
- CYP3A4 metabolism (liver enzyme)
- P-glycoprotein (P-gp) transport (drug efflux pump)
Metoprolol does not inhibit or induce either of these pathways. The beta-blocker works through completely different mechanisms (blocking beta-adrenergic receptors) and has no effect on rivaroxaban's pharmacokinetics.
Drugs That DO Interact With Rivaroxaban
To understand what's safe, it's important to know what's NOT safe. Avoid combining rivaroxaban with strong dual CYP3A4 and P-gp inhibitors or inducers 1:
Strong inhibitors to avoid (increase bleeding risk):
- Ketoconazole
- Ritonavir
- Cobicistat
Strong inducers to avoid (decrease effectiveness):
- Carbamazepine 2
- Rifampin
- Phenytoin
The Diltiazem Contrast
Recent high-quality evidence demonstrates why metoprolol is actually the preferred rate-control agent when used with rivaroxaban. A 2024 JAMA study 3 and 2026 Annals of Internal Medicine study 4 both showed that diltiazem (a calcium channel blocker that IS a CYP3A4/P-gp inhibitor) significantly increases bleeding risk when combined with rivaroxaban:
- Diltiazem increased serious bleeding by 10.6 events per 1000 person-years compared to metoprolol 3
- Higher diltiazem doses (>120 mg/day) carried even greater risk 4, 3
- Metoprolol was used as the safe comparator in both studies
This evidence base explicitly validates metoprolol as the appropriate beta-blocker choice for rate control in atrial fibrillation patients taking rivaroxaban.
Clinical Bottom Line
Continue both medications without dose adjustment. No additional monitoring beyond standard anticoagulation surveillance is needed. If rate control is needed for atrial fibrillation in a patient on rivaroxaban, metoprolol is actually preferable to calcium channel blockers like diltiazem or verapamil.