Zepbound vs. Contrave

See how Zepbound and Contrave compare on approved uses, dosing, side effects, and cost.

Key Takeaways

  • Zepbound is a once-weekly injectable that's FDA-approved for both weight management and moderate-to-severe obstructive sleep apnea, while Contrave is a twice-daily pill approved only for weight management.

  • Both drugs are meant to be used alongside a reduced-calorie diet and exercise, but they work through very different mechanisms and carry different warning labels.

  • Contrave carries a boxed warning for suicidal thoughts and behaviors tied to its bupropion component, a risk that Zepbound's GLP-1/GIP mechanism does not carry.

Zepbound vs. Contrave Drug Summary

Zepbound

Zepbound (tirzepatide) is a GIP and GLP-1 receptor agonist injected once a week. It's approved to treat chronic weight management in adults with obesity or overweight plus a weight-related condition, and separately for moderate-to-severe obstructive sleep apnea in adults with obesity. Dosing starts at 2.5 mg and is increased every four weeks up to a maximum of 15 mg weekly.

Contrave

Contrave combines naltrexone, an opioid antagonist, with bupropion, an antidepressant, in one extended-release tablet. It's approved for chronic weight management in adults with obesity or overweight plus a weight-related condition, taken twice daily. The dose is increased over three weeks up to the full maintenance dose of 16 mg/180 mg twice daily.

Zepbound vs. Contrave Side Effects

Zepbound

Most common
Nausea (up to 29%)
Constipation (up to 17%)
Vomiting (up to 13%)
Diarrhea (up to 23%)

Contrave

Most common
Nausea (up to 32.5%)
Constipation (up to 19.2%)
Vomiting (up to 10.7%)
Headache (up to 17.6%)

Zepbound vs. Contrave Dosage

Zepbound

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 2.5 mg once weekly Weeks 1-4
Maximum dose 15 mg once weekly Week 21 onward
Dose changes 5 increases Every 4 weeks

Contrave

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 8 mg/90 mg once daily Week 1
Maximum dose 16 mg/180 mg twice daily Week 3 onward
Dose changes 2 increases Every week

Zepbound vs. Contrave Indications

Zepbound

Zepbound is FDA-approved for two separate uses: long-term weight management in adults with obesity, or overweight with a weight-related condition, and treatment of moderate-to-severe obstructive sleep apnea in adults with obesity. Both uses require pairing the medication with a reduced-calorie diet and increased physical activity.

  • Chronic weight management in obesity or overweight plus comorbidity

  • Moderate-to-severe obstructive sleep apnea with obesity

  • Used with reduced-calorie diet and increased exercise

  • Not for use with other tirzepatide or GLP-1 products

Contrave

Contrave is FDA-approved for chronic weight management in adults with obesity, or overweight with at least one weight-related condition. It is not approved for depression, other psychiatric conditions, or smoking cessation, even though its individual ingredients are used for those purposes elsewhere. It must be paired with a reduced-calorie diet and increased physical activity.

  • Chronic weight management in obesity or overweight plus comorbidity

  • Not approved for depression or other psychiatric disorders

  • Not approved for smoking cessation

  • Used with reduced-calorie diet and increased exercise

Zepbound vs. Contrave Pros and Cons

Zepbound

Zepbound is a highly potent injectable that also carries a distinct FDA approval for obstructive sleep apnea, something Contrave does not offer. Insurance coverage for weight-loss GLP-1 injections is inconsistent, so out-of-pocket cost can be a real barrier despite strong clinical results.

Pros

  • Only weight-loss drug also FDA-approved for sleep apnea

  • Once-weekly dosing means fewer doses per month

  • Strong average weight loss shown in clinical trials

  • No boxed warning for suicidal thoughts

Cons

  • Requires self-injection instead of a pill

  • Longer titration schedule, about 20 weeks to max dose

  • Costs roughly $1,050 to $1,100 a month before insurance, more than Contrave

  • Common GI side effects like nausea and diarrhea

Contrave

Contrave offers an oral alternative for people who want to avoid injections, with a much shorter titration period than Zepbound. Its bupropion component carries a boxed warning for suicidal thoughts, and it has more contraindications to screen for before starting.

Pros

  • Oral tablet, no injections needed

  • Shorter titration, full dose reached in 3 weeks

  • Costs roughly $750 to $840 a month before insurance, less than Zepbound

  • Available since 2014, longer real-world track record

Cons

  • Boxed warning for suicidal thoughts and behaviors

  • Contraindicated with seizure disorders, uncontrolled hypertension, and opioid use

  • Generally produces less weight loss than GLP-1 injectables

  • Higher nausea rate than Zepbound in trials

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