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Mounjaro vs Zepbound: same drug, different label

Mounjaro and Zepbound contain the same active ingredient, tirzepatide, made by Eli Lilly, in the same 2.5 to 15 mg strengths [1] [2]. The difference is the approved use: Mounjaro is for type 2 diabetes, while Zepbound is for weight management and obstructive sleep apnea [2] [1]. That label difference drives insurance coverage and price, with Mounjaro listed at $1,112.16 for 28 days [3] and Zepbound sold self-pay from $299 a month [4].

Updated Oct 17, 2026By the Wellchosen Health editorial team

Medical review: pending. A licensed clinician has not yet reviewed this page.

Mounjaro and Zepbound are two brand names for tirzepatide injection: Mounjaro is labeled for type 2 diabetes and Zepbound for chronic weight management and obstructive sleep apnea.

Active ingredient
Tirzepatide in both [1] [2]
Mounjaro is for
Type 2 diabetes in adults and children 10+, and heart-risk reduction in adults with type 2 diabetes [2]
Zepbound is for
Weight reduction in adults with obesity or overweight plus a condition, and sleep apnea with obesity [1]
Price
Mounjaro list $1,112.16 per 28 days [3]; Zepbound $299 to $449 self-pay [4]
Use together?
No. Zepbound should not be used with other tirzepatide products [5]

Quick answer

Yes, Mounjaro and Zepbound are the same drug. Both are tirzepatide injections from Eli Lilly, and both labels list single-dose pens or vials in 2.5, 5, 7.5, 10, 12.5 and 15 mg [1]. FDA approved Mounjaro for type 2 diabetes on May 13, 2022 [6] and Zepbound for chronic weight management on Nov 8, 2023 [7]. The brand you are prescribed depends mostly on your diagnosis, and that decides how insurance treats it.

Side-by-side

Mounjaro vs Zepbound, label and price facts as of Oct 17, 2026
MounjaroZepbound
Active ingredientTirzepatide [2]Tirzepatide [1]
Approved usesBlood sugar control in type 2 diabetes (adults and age 10+); lowering major heart events in high-risk adults with type 2 diabetes [2]Weight reduction and maintenance in adults with obesity, or overweight with a related condition; moderate to severe sleep apnea with obesity [1]
Recent label changesPediatric use added 12/2025; heart-risk use added 08/2026 [2]Sleep apnea added Dec 20, 2024 [8]
Starting dose2.5 mg weekly [2]2.5 mg weekly for 4 weeks [1]
Step-ups2.5 mg steps after at least 4 weeks if more blood sugar control is needed [2]5 mg after 4 weeks, then 2.5 mg steps after at least 4 weeks [1]
Maintenance and maxNo separate maintenance list; max 15 mg adults, 10 mg children [2]5, 10 or 15 mg for weight; 10 or 15 mg for sleep apnea; max 15 mg [1]
Missed doseWithin 4 days, otherwise skip [2]Within 4 days, otherwise skip [1]
Pregnancy wordingUse only if benefit justifies fetal risk [2]Stop when pregnancy is recognized [9]
PriceList $1,112.16 per 28 days; savings card $25 if covered, $499 if not covered [3] [10]LillyDirect $299 to $449; list $1,087 [4] [11]
MedicareRegular Part D plans may cover it for type 2 diabetes [12]KwikPen through the GLP-1 Bridge for $50 if eligible [12]

Which is better for weight loss?

The molecule is identical, so the question is about the trials behind each label. Zepbound's weight trials reported an average loss of 15.0%, 19.5% and 20.9% at 5, 10 and 15 mg over 72 weeks in adults without diabetes, versus 3.1% on placebo [9]. In adults with type 2 diabetes, Zepbound's label reports 12.8% at 10 mg and 14.7% at 15 mg versus 3.2% [9]. Mounjaro's label is built around blood sugar, not weight [2].

Side effect rates also look different on paper. Nausea was 12% to 18% on Mounjaro in diabetes trials and 25% to 29% on Zepbound in weight trials [2] [9]. Those trials enrolled different people at different doses, so the gap does not mean one brand is gentler. See tirzepatide side effects and Mounjaro side effects.

Which is cheaper?

Without insurance, Zepbound is usually cheaper because Lilly sells it self-pay: $299 at 2.5 mg, $399 at 5 mg and $449 at 7.5 to 15 mg through LillyDirect if refilled within 45 days, checked Oct 17, 2026 [4]. Mounjaro's list price is $1,112.16 for four pens [3]. Lilly's Mounjaro savings card brings a covered prescription to as little as $25 (up to $150 off a month) or an uncovered one to as little as $499, but it requires commercial insurance and a prescription for an approved use [10]. We could not confirm a LillyDirect self-pay price for Mounjaro.

More on Mounjaro cost, Zepbound cost and insurance for Zepbound or Mounjaro.

How compounded tirzepatide differs from both

Compounded tirzepatide is made by a pharmacy, not by Lilly, and it is not FDA-approved; FDA does not review it for safety, effectiveness or quality [13]. FDA has told telehealth companies that calling a compounded drug "generic," saying it has the "same active ingredient" as a brand, or implying it matches a brand's results is misleading [14]. Some compounded products also contain added ingredients: FDA's Sept 18, 2026 letter to Empower Pharmacy cited tirzepatide with niacinamide [15]. FDA had more than 730 adverse event reports for compounded tirzepatide as of May 31, 2026 [13]. Read compounded tirzepatide.

Switching between Mounjaro and Zepbound

People switch brands when a diagnosis or coverage changes. Because both are tirzepatide, Lilly says Zepbound should not be used with other tirzepatide-containing products [5], and Zepbound's label adds that it is not recommended with any GLP-1 receptor agonist [1]. The labels do not give a brand-to-brand switching schedule; the strengths are the same, and your prescriber sets the dose. The label schedule is on Mounjaro dosage. See switching GLP-1s.

Who each fits

  • Mounjaro fits a type 2 diabetes diagnosis, including the label's heart-risk use and children 10 and older [2]. Insurance and Medicare drug plans treat it as a diabetes drug.
  • Zepbound fits weight management or sleep apnea without a diabetes-only label, and is the brand Lilly sells self-pay at $299 to $449 [4].

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Online programs that prescribe Zepbound (clean, provisional)

  1. Ro (Ro Body Program)

    Clean
    Price
    Zepbound KwikPen $299 (2.5 mg), $399 (5 mg), $449 (7.5 to 15 mg) a month; Wegovy pill $149 to $299; Wegovy pen $199 for the first 2 months at 0.25 to 0.5 mg, then $349, or $399 for 7.2 mg. Membership $39 the first month, then $74 to $149 a month. Checked Oct 17, 2026 [16].
    What you get
    FDA-approved brand drugs only (Zepbound, Wegovy pen and pill, Foundayo, Ozempic). Helps with insurance prior authorizations.
    FDA record
    No FDA warning letter found as of Oct 17, 2026.
    BBB
    BBB profile not checked as of Oct 17, 2026.
    Note
    Membership is billed on top of the drug. The $74 rate needs a 12-month prepay. Verdict: clean (provisional). Ro review

    Visit Ro (Ro Body Program)

  2. LifeMD

    Clean
    Price
    Wegovy pill from $149, Wegovy pen from $199, Zepbound vial from $299 a month, plus a program fee of $39 the first month and $149 a month after. Checked Oct 17, 2026 [17].
    What you get
    Brand GLP-1s with insurance help. Says compounded drugs "may" be prescribed through a compounding partner, with no products or prices shown.
    FDA record
    No FDA warning letter found as of Oct 17, 2026.
    BBB
    BBB profile not checked as of Oct 17, 2026.
    Note
    Its own pages list two different program fees ($149 and $75). Medicare patients are not eligible for the program. Verdict: clean (provisional). LifeMD review

    Visit LifeMD

  3. PlushCare weight loss

    Clean
    Price
    Membership $19.99 a month (first month free) plus $129 for the first visit without insurance; medication and labs extra. Checked Oct 17, 2026 [18].
    What you get
    Brand weight-loss prescriptions sent to your own pharmacy; no compounded drugs.
    FDA record
    No FDA warning letter found as of Oct 17, 2026.
    BBB
    BBB profile not checked as of Oct 17, 2026.
    Note
    Cheap visits, but you still pay the drug price at your pharmacy or through LillyDirect or NovoCare. Verdict: clean (provisional). PlushCare review

    Visit PlushCare weight loss

See Ro prices

Shared warnings

Both carry a boxed warning for thyroid C-cell tumors in rats and should not be used with a personal or family history of medullary thyroid carcinoma or MEN 2 [9]. Low blood sugar is more common with insulin or a sulfonylurea; on Mounjaro with a sulfonylurea, 9.9% to 13.8% had levels below 54 mg/dL [2]. Get care for severe, lasting stomach pain or signs of an allergic reaction [9]. Call 911 in an emergency.

Background on the drug itself: tirzepatide, Mounjaro and Zepbound.

Questions people ask

Is Mounjaro the same as Zepbound?

Yes. Both are tirzepatide injections from Eli Lilly in the same 2.5 to 15 mg strengths [1] [2]. Mounjaro is labeled for type 2 diabetes and Zepbound for weight management and sleep apnea.

Is tirzepatide the same as Zepbound?

Tirzepatide is the active ingredient; Zepbound is Lilly's brand of it for weight management and sleep apnea, and Mounjaro is its brand for type 2 diabetes [1] [2].

Is Zepbound better than Mounjaro for weight loss?

They contain the same drug. Zepbound is the one approved for weight, with average losses of 15.0% to 20.9% at 72 weeks in adults without diabetes across its three maintenance doses [9]. Mounjaro is approved for blood sugar control [2].

Which is cheaper, Mounjaro or Zepbound?

Without insurance, Zepbound: $299 to $449 a month through LillyDirect, checked Oct 17, 2026 [4]. Mounjaro lists at $1,112.16 for 28 days, and its savings card needs commercial insurance [3] [10].

What is the difference between Zepbound and compounded tirzepatide?

Zepbound is FDA-approved and made by Lilly. Compounded tirzepatide is made by a pharmacy, is not FDA-approved, and FDA does not review it for safety, effectiveness or quality [13]. Some versions add other ingredients, such as niacinamide [15].

Can you take Mounjaro and Zepbound together?

No. Zepbound should not be used with other tirzepatide-containing products such as Mounjaro [5].

How much does Mounjaro cost?

Mounjaro's list price is $1,112.16 for a 28-day supply of four pens [3]. With commercial coverage the savings card can lower it to $25; if your plan does not cover it, as low as $499. Uninsured and government-insured patients cannot use the card [10].

Sources

18 cited
  1. Zepbound (tirzepatide) prescribing information. DailyMed, NLM/NIH, Aug 2026.
  2. Mounjaro (tirzepatide) prescribing information. DailyMed, NLM/NIH, Aug 2026.
  3. Mounjaro FAQ. Eli Lilly and Company, Oct 17, 2026.
  4. Zepbound on LillyDirect: self-pay prices. Eli Lilly and Company (LillyDirect), Oct 17, 2026.
  5. Zepbound FAQ. Eli Lilly and Company, Oct 17, 2026.
  6. Drug Trials Snapshots: Mounjaro. US Food and Drug Administration, May 13, 2022.
  7. FDA approves new medication for chronic weight management. US Food and Drug Administration, Nov 8, 2023.
  8. FDA approves first medication for obstructive sleep apnea. US Food and Drug Administration, Dec 20, 2024.
  9. Zepbound prescribing information (217806 s050). US Food and Drug Administration, Apr 2026.
  10. Mounjaro savings resources. Eli Lilly and Company, Oct 17, 2026.
  11. TrumpRx.gov GLP-1 listings. TrumpRx.gov (US government), Oct 17, 2026.
  12. Weight loss drugs coverage. Medicare.gov (CMS), Oct 17, 2026.
  13. FDA's concerns with unapproved GLP-1 drugs used for weight loss. US Food and Drug Administration, Oct 1, 2026.
  14. For telehealth companies: what to know when promoting compounded drugs. US Food and Drug Administration, Jun 15, 2026.
  15. Warning letter: Empower Clinic Services, LLC dba Empower Pharmacy. US Food and Drug Administration, Sep 18, 2026.
  16. Ro weight loss pricing. Ro, Oct 17, 2026.
  17. LifeMD weight management. LifeMD, Inc., Oct 17, 2026.
  18. PlushCare weight loss. PlushCare, Oct 17, 2026.

This page is general information, not medical advice. Talk with a licensed clinician about your own care.

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