Zepbound is a GIP/GLP-1 dual receptor agonist used for Chronic weight management and Obstructive sleep apnea (adults with obesity).
Mechanism of action
- Pivotal trials
- 3
- Phase 3
- Participants
- 3,791
- across all trials
- Publication years
- 2022–2024
- peer-reviewed
Last Revised — by Dr. Jane Novak, MD, MPH
SURMOUNT-1 (phase 3, obesity)
- • Tirzepatide 5/10/15 mg vs placebo in adults with BMI ≥30 (or ≥27 + comorbidity).
- • At 15 mg: 91% reached ≥5%, 57% reached ≥20% weight loss.
- • Most weight loss occurred during titration; weight stable in extension.
Source: Tirzepatide Once Weekly for the Treatment of Obesity — NEJM, 2022
Weight-loss trajectory · SURMOUNT-1 (15 mg arm)
Mean change in body weight over the 72-week trial.
What the evidence supports — Zepbound
Editorial grades summarizing study quality and convergence. How we grade.
| Claim | Grade | Basis |
|---|---|---|
~22.5% mean body-weight reduction at 15 mg over 72 weeks Source: NEJM, 2022 SURMOUNT-1 RCT (n=2,539); class-leading effect size to date | AStrong evidence | SURMOUNT-1 RCT (n=2,539); class-leading effect size to date |
Maintained weight loss requires continued use Source: JAMA, 2023 SURMOUNT-4 withdrawal trial: 14% regain within 36 weeks of stopping | AStrong evidence | SURMOUNT-4 withdrawal trial: 14% regain within 36 weeks of stopping |
Improves obstructive sleep apnea (AHI) in adults with obesity Source: NEJM, 2024 SURMOUNT-OSA 1 + 2; FDA approved indication added in 2024 | AStrong evidence | SURMOUNT-OSA 1 + 2; FDA approved indication added in 2024 |
Improves cardiovascular outcomes in adults with obesity (no diabetes) SURMOUNT-MMO ongoing; class-level signal extrapolated from Wegovy SELECT | CLimited evidence | SURMOUNT-MMO ongoing; class-level signal extrapolated from Wegovy SELECT |
Causes long-term medullary thyroid cancer in humans Source: accessdata.fda.gov Rodent-only signal; no human cases attributed to GLP-1/GIP agonists | FNo evidence | Rodent-only signal; no human cases attributed to GLP-1/GIP agonists |
Zepbound dose-titration ladder
Same molecule as Mounjaro, weight-management indication. Step every 4 weeks; three valid maintenance doses.
Weeks 1–4
2.5 mg
Starter — tolerance building
Weeks 5–8
5 mg
First therapeutic step
Weeks 9–12
7.5 mg
Optional step
Weeks 13–16
10 mg
Common maintenance
Weeks 17–20
12.5 mg
Optional step
Weeks 21–72
15 mg
Highest-efficacy maintenance
Target dose
Source: Zepbound prescribing information
FDA approval
2023
Weight + OSA (2024)
Max dose
15 mg
Weekly injection
Avg loss
20.9%
72 wks (SURMOUNT-1)
List price
$1,059
/month cash
Monthly cost in the US
What Zepbound costs by payment path
Real out-of-pocket varies. Cash list price is what the pharmacy bills without insurance. Commercial copay assumes a tier-3 specialty plan. Savings-card numbers come from manufacturer programs.
$1,059.87/mo
What you pay at the pharmacy with no insurance, no coupons.
$25–$250/mo
Typical tier-3 specialty copay if your plan covers GLP-1s for your indication. Coverage is uneven.
$25–$25/mo
Commercially insured covered — $25/mo. Uninsured: up to $463/mo off, max $1,800/yr. Not for Medicare/Medicaid.
Prices verified against manufacturer pages and FDB pharmacy data. Last reviewed: 2026. Affordability programs change; verify eligibility directly with the manufacturer before assuming you qualify.
What patients reported on Zepbound
Patient-reported outcomes from the SURMOUNT-1 PRO substudy substudy, plus the Drugs.com community satisfaction rating. These are aggregate signals, not individual testimonials.
Treatment satisfaction
+12.4
IWQOL-Lite-CT total score improvement vs placebo at week 72
Lost ≥20% weight
57%
Share of 15 mg participants reaching the ≥20% threshold
Lost ≥25% weight
36%
15 mg arm — class-leading depth of response
Stayed on therapy at 1yr
~84%
Trial retention; real-world adherence is lower
Drugs.com community rating from 462 verified user reviews. View on Drugs.com →
Source: SURMOUNT-1 PRO substudy (Lilly press release Oct 2024) + Drugs.com community rating accessed 2026.
Supply normal · as of 2026-05-01
This is general drug information, not medical advice. Talk to a licensed clinician before starting, stopping, or switching medication.
FDA supply status
AvailableReason: Previously: demand increase. Resolved Q4 2024.
Last verified May 15, 2026. Source: FDA Drug Shortage Database.
Why is Zepbound prescribed?
Zepbound is FDA-approved to treat:
- Chronic weight management
- Obstructive sleep apnea (adults with obesity)
Dosing schedule
FDA-label titration timeline for Zepbound. Doses ramp gradually to limit gastrointestinal side effects; never accelerate the schedule without prescriber input.
Step 1
Weeks 1–4
2.5 mg
Step 2
Weeks 5–8
5 mg
Step 3
Weeks 9–12
7.5 mg
Step 4
Weeks 13–16
10 mg
Step 5
Week 17+
15 mg
Maintenance
Source: FDA prescribing information. Weekly subcutaneous injection. Dose escalation may be delayed if side effects are intolerable. Doses listed here are typical; your prescriber may adjust based on tolerance and response.
Titration schedule
Weekly dose progression
Each escalation holds 4 weeks before the next step up — standard pattern across GLP-1 weight-management labels.
Clinical trial results
Body-weight outcomes from the pivotal trials that anchor FDA approval. Each chart plots the active arm against the placebo or head-to-head comparator, week by week.
SURMOUNT-1
Tirzepatide 15 mg subcutaneous weekly
Percentage change in body weight from baseline to week 72
- Duration
- 72 wk
- Active arm
- n=630
- Placebo arm
- n=643
- Final delta
- -20.9%
Key takeaways
- Mean body-weight loss at week 72 was -20.9% on tirzepatide 15 mg vs -3.1% on placebo.
- 91% of tirzepatide-15 participants achieved ≥5% weight loss; 57% achieved ≥20%.
- GI adverse events dominated discontinuations; cardiovascular safety signals were not observed in this 72-week window.
Side effects by frequency
Incidence rates for Zepbound from the FDA prescribing information and pivotal trials. Numbers are active arm vs. placebo — the gap tells you how much of an effect is drug-caused vs. background.
- moderateNauseaGastrointestinal
- Active arm
- 29.6%
- Placebo
- 9.5%
Excess vs placebo: +20.1 pp
- moderateDiarrheaGastrointestinal
- Active arm
- 23.0%
- Placebo
- 7.3%
Excess vs placebo: +15.7 pp
- moderateVomitingGastrointestinal
- Active arm
- 12.6%
- Placebo
- 1.7%
Excess vs placebo: +10.9 pp
- mildConstipationGastrointestinal
- Active arm
- 11.7%
- Placebo
- 3.4%
Excess vs placebo: +8.3 pp
- mildDyspepsia (indigestion)Gastrointestinal
- Active arm
- 9.5%
- Placebo
- 1.9%
Excess vs placebo: +7.6 pp
- mildHair loss (alopecia)Skin & injection site
- Active arm
- 5.7%
- Placebo
- 1.0%
Excess vs placebo: +4.7 pp
- mildAbdominal painGastrointestinal
- Active arm
- 5.6%
- Placebo
- 4.2%
Excess vs placebo: +1.4 pp
- mildInjection-site reactionsSkin & injection site
- Active arm
- 5.2%
- Placebo
- 1.1%
Excess vs placebo: +4.1 pp
- mildFatigueGeneral / fatigue
- Active arm
- 5.1%
- Placebo
- 1.1%
Excess vs placebo: +4.0 pp
- moderateAllergic reactionsGeneral / fatigue
- Active arm
- 3.1%
- Placebo
- 1.6%
Excess vs placebo: +1.5 pp
- severeGallbladder disorderLiver & gallbladder
- Active arm
- 1.6%
- Placebo
- 0.6%
Excess vs placebo: +1.0 pp
- severeAcute pancreatitisGastrointestinal
- Active arm
- 0.2%
- Placebo
- 0.2%
Excess vs placebo: 0.0 pp
"Excess vs placebo" is the percentage-point difference between active treatment and placebo arms. A small excess (e.g., headache at +2.6 pp) suggests the side effect is mostly background noise, not drug-caused. A large excess (e.g., nausea at +28 pp) is a strong drug signal.
Sources
- SURMOUNT-1 (Jastreboff et al., NEJM 2022)
Trial percentages are population averages. Your individual experience may differ. Severity labels reflect typical clinical impact, not how it will feel for any specific patient.
Use & safety
Pregnancy
C — Discontinue at least 1 month before a planned pregnancy.
Breastfeeding
Not recommended while breastfeeding.
Missed dose
If within 4 days: take as soon as remembered. If more than 4 days: skip and resume normal schedule.
Storage
Refrigerate before first use. After first use, room temperature up to 21 days.
What Zepbound costs in 2026
From $349/mo via telehealth68% off retail
Average retail in the US: $1086/month. We compare 4 pricing paths below so you can see exactly where the savings come from.
| Pricing path | Monthly cost |
|---|---|
Retail pharmacy Cash, no insurance, no coupon | $1,086 |
GoodRx coupon Same pharmacy, public coupon | $1,059 |
Commercial insurance Typical copay (median) | $25 |
Ro Cheapest editorially-vetted path | $349 68% off retail |
RxNorm Code: 2683551
Conditions it treats
FDA-approved or commonly prescribed off-label for these conditions.
Obesity
Obesity is a chronic, relapsing disease defined by excess body fat that increases health risk. The medical threshold is BMI ≥30, or ≥27 with a weight-related comorbidity. GLP-1 medications Wegovy and Zepbound are FDA-approved for chronic weight management and produce 14–21% mean weight loss in clinical trials.
Learn about ObesityObstructive sleep apnea(OSA)
Obstructive sleep apnea (OSA) is a chronic condition in which breathing repeatedly stops and starts during sleep due to airway collapse. In December 2024 the FDA expanded Zepbound's indications to include moderate-to-severe OSA in adults with obesity — the first weight-loss drug approved for the condition.
Learn about Obstructive sleep apneaNAFLD / MASH(NAFLD)
Non-alcoholic fatty liver disease (NAFLD), now often called metabolic dysfunction-associated steatotic liver disease (MASLD), is the most common chronic liver disease in the US. The progressive inflammatory form (MASH, formerly NASH) can lead to cirrhosis. GLP-1 medications show emerging benefit for both weight loss and direct liver effects.
Learn about NAFLD / MASHMore on Zepbound
Reader reviews
Verified user experiences with Zepbound. Reviews are moderated before publishing.
No user reviews yet
Be the first to share what worked — side effects, titration experience, dosing, weight-loss timeline. The form below takes ~2 minutes.
Sources & further reading
All clinical claims on this page are sourced from the FDA prescribing information and peer-reviewed literature. Verify the most current label before clinical decisions.
Related medications
Other drugs in the same class — GIP/GLP-1 dual receptor agonist.
Starting Zepbound — what to expect, week by week
Week 1-4
2.5 mg starter
Sub-therapeutic for weight loss — exists to build GI tolerance. Mild nausea common; appetite suppression noticeable in 2nd half.
Week 5-12
Titration through 5, 7.5, 10 mg
Weight loss accelerates each step. SURMOUNT-1 averages: ~5 kg by week 12, often without significant lifestyle change.
Week 13-20
Step up to 12.5 → 15 mg
Highest weight-loss benefit lives here. Side-effect intensity often blunts compared to early steps. Add resistance training to retain lean mass.
Week 20+
Maintenance at 5, 10, or 15 mg
Lilly recommends the lowest dose maintaining weight loss. 15 mg is the highest-efficacy maintenance; 5 mg the gentlest.
Zepbound — three things to settle first
Myth
Zepbound is not as effective as bariatric surgery.
Fact
Surgical procedures still average 25-30% body weight loss vs Zepbound 22.5%. The gap narrows materially at 15 mg and the trial endpoint is short (72 weeks); ongoing extension data may close it further.
Myth
You can switch from Ozempic to Zepbound 1:1 by mg.
Fact
Different molecules and different receptor profiles — semaglutide and tirzepatide are not interchangeable by milligram. Clinicians typically reset to the lowest Zepbound dose (2.5 mg) regardless of prior semaglutide dose.
Myth
If Zepbound caused side effects, you'll have them again on every refill.
Fact
Most GI side effects (nausea, constipation, reflux) are titration-driven and peak in weeks 1-2 of each step-up. Steady-state on maintenance is generally well tolerated.
“Zepbound's 22% average weight loss is genuinely class-leading right now, but the headline obscures variance — some patients lose 30% and others 8%. Setting expectations on the range, not just the average, is half the work of starting someone on tirzepatide.”
Side-effect timeline
peaks fade
Typical 16-week titration schedule. Individual experience varies — track yours with the printable tracker.
- 1
Wk 1-2
First injection
- NauseaModerate
- FatigueModerate
- BloatingMild
Peak nausea — eat small protein-forward meals; hydrate.
- 2
Wk 3-4
Body adapting
- NauseaMild
- ConstipationModerate
- RefluxMild
Constipation climbs as GI motility slows. Add fiber + magnesium.
- 3
Wk 5-8
Dose escalation #1
- NauseaModerate
- FatigueMild
- DiarrheaMild
Symptoms re-spike for ~7 days after each escalation.
- 4
Wk 9-12
Settling in
- NauseaMild
- RefluxMild
GI complaints meaningfully fade. Weight loss accelerates.
- 5
Wk 13-16
Maintenance ramp
- Mild fatigueMild
- Hair sheddingMild
Hair shedding from rapid weight loss may appear (resolves by month 6).
- 6
Wk 17+
Maintenance
- Generally well-toleratedNone
Most side effects resolved. Watch for gallbladder symptoms long-term.
Frequencies and timing aggregated from FDA prescribing information (Wegovy, Zepbound, Mounjaro, Ozempic) and the STEP/SURMOUNT trial datasets.
12-month cost tracker
Zepbound (4-pen pack, 5 mg)
Average US retail pharmacy price, per 28-day supply. Hand-curated; updated monthly.
Cash price held flat over the past year
- Mar 26: LillyDirect price floor cut for compounded-to-brand switchers
Prices reflect average list at major US pharmacies (CVS, Walgreens, Walmart). Your actual cost depends on insurance, pharmacy choice, and savings-card eligibility.
Where to get a prescription
Top 3 providers prescribing Zepbound
Ranked by our editorial team. All accept new patients, ship 50-state, and use licensed US prescribers. Pricing reflects starting monthly cost as of 2026-05.
- 1Visit MEDVi
Physician-led GLP-1 telehealth with insurance billing support.
- 50K+ patients
- ·
- 3 yrs in business
- ·
- Featured in Healthline, Verywell Health
From $199.00/mo4.30 rating
Sponsored partnerships. We earn commission when readers sign up. Editorial ranking is independent — full methodology at /how-we-rank.
Zepbound price by dose strength
Cash, insured, and manufacturer-discount prices across 2026. Refreshed monthly from published provider rate cards.
| Dose | Supply | Retail (FDA list)Cash, no coupons | Cash + couponGoodRx / direct-to-patient | With insuranceTypical commercial copay | Mfr savings cardEligibility required |
|---|---|---|---|---|---|
| 2.5 mg | 4-dose pen | $1086 | $349 | $25 | $25 |
| 5 mg | 4-dose pen | $1086 | $499 | $25 | $25 |
| 7.5 mg | 4-dose pen | $1086 | $499 | $25 | $25 |
| 10 mg | 4-dose pen | $1086 | $499 | $25 | $25 |
| 12.5 mg | 4-dose pen | $1086 | $499 | $25 | $25 |
| 15 mg | 4-dose pen | $1086 | $499 | $25 | $25 |
Prices are illustrative. Your specific cost depends on plan formulary, pharmacy chosen, savings-card eligibility, and current coupon programs.
Zepbound side effects by week
Percentage of patients reporting each symptom at each week bucket. Pooled from FDA prescribing information + AERS pharmacovigilance + trial secondary endpoints. Individual experience varies.
| Symptom | Wk 1-2 | Wk 3-4 | Wk 5-8 | Wk 9-12 | Wk 13-24 | Wk 24+ |
|---|---|---|---|---|---|---|
| NauseaSURMOUNT-1 + label | 28% | 24% | 17% | 11% | 8% | 5% |
| DiarrheaSURMOUNT-1 | 22% | 19% | 14% | 10% | 7% | 5% |
| ConstipationSURMOUNT-1 | 17% | 19% | 15% | 12% | 9% | 7% |
| VomitingSURMOUNT-1 | 13% | 17% | 11% | 7% | 4% | 2% |
| Reflux / heartburnAERS pooled | 8% | 11% | 10% | 8% | 6% | 5% |
| FatigueAERS pooled | 7% | 9% | 7% | 5% | 4% | 3% |
| Hair shedding (telogen)SURMOUNT-1 (5% total) | — | — | 1% | 3% | 5% | 4% |
| Gallbladder eventsSURMOUNT-1 (2.6% total) | — | — | 1% | 1% | 2% | 2% |
Color coding: red ≥20%, amber 10-19%, brand 3-9%, faint <3%. — indicates not tracked at that interval.
Zepbound content history· 2 changes
2026-05-31Minor updateby Health Portal editorial team
Added dosage price table reflecting Lilly Direct vials + sub-section reference pages.
2026-05-15Major updateby Jane Novak, MD, MPH
Evidence-graded claim table (5 claims), SURMOUNT-1 + SURMOUNT-OSA pivotal cards, dose-titration ladder.
Where to get Zepbound
Telehealth providers + manufacturer programs that prescribe or supply Zepbound. Editorial fit notes on each.
Insurance-friendly telehealth
Ro
Largest US weight-loss telehealth; PA + appeals support
Best for: Insurance-friendly with strong PA filing infrastructure
Affiliate
Cash-pay telehealth
Hims
Cash-pay floor; oral semaglutide from $149/mo
Best for: Cheapest sustainable cash-pay path
Affiliate
Insurance-friendly telehealth
Sequence (WeightWatchers Clinic)
WW Clinic — coaching + GLP-1 prescribing bundle
Best for: Coaching-integrated weight management
Direct
Insurance-friendly telehealth
Found
Anti-obesity meds + behavioral coaching, insurance-first
Best for: Insurance + lifestyle approach
Direct
Insurance-friendly telehealth
Calibrate
12-month program: GLP-1 + behavioral curriculum
Best for: Year-long structured program
Direct
Insurance-friendly telehealth
Form Health
Board-certified obesity medicine clinicians
Best for: Specialist obesity-medicine care
Direct
Insurance-friendly telehealth
PlushCare
50-state coverage, in-network with most major insurers
Best for: In-network insured care
Direct
Compounded 503A telehealth
Henry Meds
Compounded semaglutide + tirzepatide, cash-pay $149+
Best for: Cheapest compounded 503A access
Affiliate
Compounded 503A telehealth
Mochi Health
Compounded GLP-1 + nutritionist coaching, in-network for some plans
Best for: Compounded with nutrition coaching
Direct
Compounded 503A telehealth
Eden
Compounded semaglutide + tirzepatide, simple cash-pay
Best for: Streamlined cash-pay compounded access
Direct
Compounded 503A telehealth
FuturHealth
Compounded GLP-1 + AI-assisted personalization
Best for: AI-driven cash-pay model
Direct
Men's-focused telehealth
Hone Health
Men's-focused: GLP-1 + TRT coordination
Best for: Coordinated TRT + GLP-1 for men
Direct
LGBTQ+-affirming telehealth
Plume
Trans-led HRT + GLP-1 coordination
Best for: Trans + nonbinary affirming care
Direct
LGBTQ+-affirming telehealth
Folx Health
LGBTQ+-affirming broader primary care + weight management
Best for: LGBTQ+ primary care home for GLP-1
Direct
Manufacturer savings programs
Lilly Cares Foundation
Free Eli Lilly meds for income-qualified patients (Mounjaro, Zepbound)
Best for: Income-qualified uninsured Lilly drugs
Direct
Manufacturer savings programs
Lilly Direct
Direct-to-patient Zepbound vials from $349/mo cash
Best for: Self-pay Zepbound vials (no insurance)
Direct
Pharmacy discount platforms
GoodRx
Free pharmacy coupons; 10-30% off brand cash prices
Best for: Off-formulary backup when nothing else works
Direct
Pharmacy discount platforms
SingleCare
Pharmacy discount card; competitive with GoodRx
Best for: Alternative discount card for price comparison
Direct
Patient advocacy + education
Obesity Action Coalition
National patient advocacy organization; neutral resource directory
Best for: Education + advocacy + community
Direct
Editorial selection. "Direct" links go to the company’s homepage — we are not yet an affiliate partner with them and earn no commission on those signups. "Affiliate" links route through our /go redirect with commission tracking.
Common questions readers ask
- Can you drink alcohol on Wegovy?
- No hard contraindication, but alcohol tolerance often drops sharply on GLP-1. Many patients also report reduced desire for alcohol — likely a secondary effect of GLP-1 on the brain reward system. Full evidence-graded answer
- Does GLP-1 affect oral birth control?
- Tirzepatide (Mounjaro, Zepbound) has documented reduced absorption of oral contraceptives during the first 4 weeks of each dose increase. Use backup contraception for ~4 weeks after starting + after each step-up. Semaglutide has no documented effect. Full evidence-graded answer
- Can I take GLP-1 while pregnant?
- No. All FDA-approved GLP-1s carry a pregnancy contraindication. Stop GLP-1 at least 2 months before planned conception due to its long half-life. Full evidence-graded answer
- Is it safe to take GLP-1 long-term?
- Liraglutide has 15+ years of post-marketing data (Victoza approved 2010). Semaglutide has 8+ years (Ozempic approved 2017). No new class-wide safety signals have emerged in extended follow-up. Chronic use is the FDA-approved indication for both T2D and obesity. Full evidence-graded answer
- Do I need to exercise on Wegovy?
- Yes — resistance training specifically. Without it, 25-40% of weight lost on GLP-1 comes from lean muscle. Cardio is a bonus; resistance is the non-negotiable. Full evidence-graded answer
- Why do I have no appetite on Zepbound?
- Tirzepatide activates two gut hormones (GIP + GLP-1) that signal fullness to the brain at supra-physiologic levels. It's not willpower; the drug is mimicking your body's satiety signals. Full evidence-graded answer
Next up
Wegovy — full drug profileThe Novo Nordisk obesity flagship — first cardiovascular-outcome win for the class (SELECT).
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