Zepbound vs. Trulicity

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

Key Takeaways

  • Zepbound is FDA-approved for chronic weight management and sleep apnea, while Trulicity is approved for type 2 diabetes and heart risk reduction, not weight loss.

  • Both drugs are once-weekly injections and carry a boxed warning for thyroid C-cell tumors, so neither is used by people with a personal or family history of medullary thyroid cancer.

  • Zepbound's titration schedule takes about five months to reach its top dose, while Trulicity reaches its main maintenance dose in just four weeks.

Zepbound vs. Trulicity Drug Summary

Zepbound

Zepbound (tirzepatide) is a dual GIP/GLP-1 receptor agonist given as a once-weekly injection. It is FDA-approved for chronic weight management in adults with obesity or overweight plus a weight-related condition, and for moderate-to-severe obstructive sleep apnea in adults with obesity. Dosing starts at 2.5 mg and rises gradually over about five months to a maintenance dose of up to 15 mg.

Trulicity

Trulicity (dulaglutide) is a GLP-1 receptor agonist given as a once-weekly injection using a prefilled pen. It is FDA-approved to help control blood sugar in adults and children age 10 and older with type 2 diabetes, and to lower the risk of major cardiovascular events in adults with type 2 diabetes and heart disease. Dosing starts at 0.75 mg and can be raised to a maintenance dose of up to 4.5 mg.

Zepbound vs. Trulicity Side Effects

Zepbound

Most common
nausea (up to 29%)
diarrhea (up to 23%)
vomiting (up to 13%)
constipation (up to 17%)

Trulicity

Most common
nausea (up to 21.1%)
diarrhea (up to 13%)
vomiting (up to 13%)
abdominal pain (up to 13%)

Zepbound vs. Trulicity 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

Trulicity

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 0.75 mg once weekly Weeks 1-4
Maximum dose 4.5 mg once weekly If needed
Dose changes 3 increases Every 4 weeks

Zepbound vs. Trulicity Indications

Zepbound

Zepbound is FDA-approved for two related uses: chronic weight management in adults with obesity or overweight who have at least one weight-related condition, and moderate-to-severe obstructive sleep apnea in adults with obesity. It is not approved to treat type 2 diabetes or any other blood sugar condition.

  • Chronic weight management in adults with obesity

  • Weight management with a related condition like high blood pressure

  • Moderate-to-severe obstructive sleep apnea with obesity

  • Used with a reduced-calorie diet and more exercise

Trulicity

Trulicity is FDA-approved to help control blood sugar in adults and children age 10 and older with type 2 diabetes. It is also approved to lower the risk of major cardiovascular events in adults with type 2 diabetes who have heart disease or multiple cardiovascular risk factors. Using Trulicity for weight loss alone is off-label, since that is not an FDA-approved use.

  • Blood sugar control in type 2 diabetes, ages 10+

  • Lowering cardiovascular event risk in type 2 diabetes

  • Used with diet and exercise

  • Off-label: weight loss in people without diabetes

Zepbound vs. Trulicity Pros and Cons

Zepbound

Zepbound's dual GIP/GLP-1 mechanism gives it two distinct FDA approvals covering weight management and sleep apnea, uses Trulicity's label does not include. Its longer titration schedule means patients wait longer to reach a fully effective dose, and it offers no path for diabetes treatment under this brand name.

Pros

  • FDA-approved for weight management and sleep apnea, not just one condition

  • First and only medication FDA-approved specifically for obstructive sleep apnea

  • Dual GIP/GLP-1 action linked to greater average weight loss in trials

Cons

  • Titration takes about five months to reach the top maintenance dose

  • Not approved for type 2 diabetes under this brand name

  • Higher rates of nausea and diarrhea reported than many GLP-1 drugs

Trulicity

Trulicity has more than a decade of real-world use in type 2 diabetes and a specific FDA approval for cutting cardiovascular risk, which Zepbound's label lacks. It reaches its working dose much faster, but it isn't approved for weight loss, so that use is off-label and less likely to be covered by insurance.

Pros

  • Reaches its main maintenance dose in just 4 weeks

  • FDA-approved to lower cardiovascular event risk in type 2 diabetes

  • Approved for children with type 2 diabetes as young as age 10

Cons

  • Not FDA-approved for weight loss, so that use is off-label

  • Average weight loss in trials tends to be lower than with dual-mechanism drugs

  • No generic version exists, keeping cash-pay prices high

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