Question 1

What is the equivalent dose of carvedilol to metoprolol succinate?

Accepted Answer

A common conversion is **25 mg/day carvedilol ≈ 100 mg/day metoprolol succinate** (so 12.5 mg BID carvedilol ≈ 100 mg succinate daily). This is a β1-equivalent estimate — actual blood pressure response will differ because carvedilol also blocks α1 receptors.

Question 2

Is metoprolol tartrate the same as metoprolol succinate at the same dose?

Accepted Answer

The total daily dose is roughly equivalent (50 mg BID tartrate ≈ 100 mg daily succinate), but the pharmacokinetics differ. Tartrate is immediate-release and dosed BID; succinate is extended-release and dosed once daily. Substituting them mg-for-mg without adjusting the schedule produces peak / trough swings that the once-daily formulation was designed to avoid.

Question 3

Can I switch from labetalol to metoprolol at home?

Accepted Answer

You can, but the BP often rises after the switch because labetalol has α-blockade that metoprolol does not. A common conversion is labetalol 200 mg/day ≈ metoprolol 100 mg/day, but in practice clinicians typically titrate up the metoprolol over several days while monitoring BP, and may add a separate agent (amlodipine, hydrochlorothiazide) to replace the lost α-effect.

Question 4

Which beta-blockers are evidence-based for heart failure?

Accepted Answer

Four agents have mortality benefit in HFrEF: carvedilol (COPERNICUS, CAPRICORN), metoprolol succinate (MERIT-HF), bisoprolol (CIBIS-II), and nebivolol (SENIORS, in elderly HFpEF/HFrEF). Atenolol, propranolol, and labetalol do not carry equivalent evidence and should not be assumed to provide HF benefit when substituted at "equivalent" doses.

Question 5

What's the target dose for beta-blockers in HFrEF?

Accepted Answer

Trial target doses: carvedilol 25 mg BID (50 mg BID if >85 kg), metoprolol succinate 200 mg/day, bisoprolol 10 mg/day. The mortality benefit was seen at these doses; lower doses are reasonable as starting points but should be uptitrated as tolerated.

Drug	Daily dose	Schedule
Metoprolol succinate (XL)	100mg/day	daily
Metoprolol tartrate (IR)	100mg/day	BID
Carvedilol	25mg/day	BID
Bisoprolol	5mg/day	daily
Atenolol	50mg/day	daily
Propranolol	80mg/day	TID–QID (IR)
Nebivolol	5mg/day	daily
Labetalol	200mg/day	BID

Beta-Blocker Equivalency

References

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