Metoprolol vs. Diltiazem
See how Metoprolol and Diltiazem compare on approved uses, dosing, side effects, and cost.
Key Takeaways
Metoprolol is a beta-blocker and diltiazem is a calcium channel blocker, so they lower blood pressure through different mechanisms with different risks.
Diltiazem does not carry the breathing risks that come with metoprolol's beta-blockade, making it a common choice for people with asthma or COPD.
Metoprolol is FDA-approved for heart failure, while diltiazem is contraindicated in heart failure caused by reduced pumping function.
Metoprolol vs. Diltiazem Drug Summary
Metoprolol
Metoprolol succinate is a beta-1 selective beta-blocker used to treat high blood pressure, angina, and heart failure. It comes as a once-daily extended-release tablet that works by blocking adrenaline's effects on the heart.
Diltiazem
Diltiazem is a non-dihydropyridine calcium channel blocker used to treat high blood pressure, angina, and certain fast heart rhythms. It is available as once-daily extended-release tablets and as an IV formulation for rapid rate control in hospitals.
Metoprolol vs. Diltiazem Side Effects
Metoprolol
Diltiazem
Metoprolol vs. Diltiazem Dosage
Metoprolol
Diltiazem
| STAGE | DOSE | WHEN |
| Starting dose | 12.5 mg once daily | Weeks 1-2 |
| Maximum dose | 100 mg once daily | Week 5 onward |
| Dose changes | 3 increases | Every 2 weeks |
| STAGE | DOSE | WHEN |
| Starting dose | 120-240 mg once daily | Weeks 1-2 |
| Maximum dose | 120-240 mg once daily | Same as starting |
| Dose changes | None | Fixed dose |
Metoprolol
| STAGE | DOSE | WHEN |
| Starting dose | 12.5 mg once daily | Weeks 1-2 |
| Maximum dose | 100 mg once daily | Week 5 onward |
| Dose changes | 3 increases | Every 2 weeks |
Diltiazem
| STAGE | DOSE | WHEN |
| Starting dose | 120-240 mg once daily | Weeks 1-2 |
| Maximum dose | 120-240 mg once daily | Same as starting |
| Dose changes | None | Fixed dose |
Metoprolol vs. Diltiazem Indications
Metoprolol
Metoprolol is FDA-approved for hypertension, angina, and stable heart failure across NYHA classes II through IV. Doctors also prescribe it off-label for atrial fibrillation rate control, migraine prevention, and essential tremor.
Hypertension (blood pressure control)
Angina pectoris (chest pain)
Heart failure, NYHA class II-IV
Off-label: atrial fibrillation rate control
Off-label: migraine prevention
Diltiazem
Diltiazem is FDA-approved for hypertension, chronic stable angina, vasospastic angina, and rate control in atrial fibrillation or flutter, as well as PSVT. It is also used off-label for migraine prevention and Raynaud's phenomenon.
Hypertension (blood pressure control)
Chronic stable angina
Vasospastic (Prinzmetal's) angina
Atrial fibrillation/flutter rate control
Off-label: migraine prevention
Metoprolol vs. Diltiazem Pros and Cons
Metoprolol
Metoprolol has decades of use as an inexpensive, once-daily beta-blocker with strong heart failure trial data. Its main tradeoffs are the need for gradual tapering and caution in people with asthma or COPD.
Pros
Also treats heart failure, unlike diltiazem which is contraindicated in it
One of the lowest-cost generic beta-blockers available
Decades of trial data supporting use in heart failure
Lower rate of leg swelling than diltiazem
Cons
Can worsen asthma or COPD symptoms due to beta-blockade
Requires gradual tapering; abrupt stopping can trigger chest pain or arrhythmia
Not safe in cardiogenic shock or decompensated heart failure
Higher reported rates of fatigue and low blood pressure
Diltiazem
Diltiazem offers broader rhythm-control indications and doesn't carry the breathing risks associated with beta-blockers. Its main tradeoffs are a higher chance of leg swelling and unsuitability for heart failure with reduced pumping function.
Pros
Also approved for vasospastic angina and PSVT, which metoprolol doesn't cover
Available as an IV infusion for fast rate control in acute settings
Does not typically worsen asthma or COPD, since it isn't a beta-blocker
Multiple oral release formulations allow flexible dosing
Cons
Can cause noticeable swelling in the lower legs
Not recommended for heart failure from reduced pumping function
More prone to interactions through CYP3A4 metabolism
Not approved for chronic heart failure management like metoprolol is
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