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
Trulicity
Zepbound vs. Trulicity Dosage
Zepbound
Trulicity
| 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 |
| 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
| 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
| 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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