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One weekly shot. Two hormone pathways.
Tirzepatide for weight loss: how it works, results and cost
By the NexLife Medical Team · Medically reviewed by Adam Kennah, MD · Updated
Tirzepatide is a once-weekly weight loss injection that acts on two appetite hormones, GIP and
- How it works: quiets hunger and slows digestion
- Dosing: 2.5 mg to 15 mg, weekly, stepped up slowly
- Brand self-pay: Zepbound $299 to $449 a month at LillyDirect ($449 from 7.5 mg needs a refill within 45 days; otherwise $499 to $699)
Tirzepatide at a glance
- What it is
- A once-weekly injection that acts on two hormone receptors, GIP and
GLP-1 - Brand names
- Zepbound for weight loss; Mounjaro for type 2 diabetes
- Common side effects
- Nausea, diarrhea, vomiting and constipation, mostly early
- Who may qualify
- Adults with a BMI of 30 or more, or 27 or more with a weight-related condition
Questions before you start? Call or text
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About 3 minutes of health questions. No insurance needed.
Compounded medicines aren’t FDA-approved. A NexLife provider prescribes one only if it offers a significant difference for you compared with an FDA-approved medicine.
Tirzepatide for weight loss: the key numbers
| Question | Answer |
|---|---|
| How much weight did people lose? | 15.0% to 20.9% of body weight on average over 72 weeks in SURMOUNT-1, versus 3.1% on placebo |
| How often do you take it? | Once a week, as an injection |
| What dose do you start on? | 2.5 mg a week for four weeks, then up in 2.5 mg steps, at least four weeks apart, to 15 mg at most |
| What does Zepbound cost? | $299 to $449 a month at LillyDirect, medication only; $449 (7.5 to 15 mg) needs a refill within 45 days, or it’s $499 to $699 |
| What does compounded tirzepatide cost? | $139 to $399 a month online in our price index; at NexLife, $139 a month on the 12-month plan, at every dose |
| Is compounded tirzepatide FDA-approved? | No. Zepbound is. The trials studied FDA-approved tirzepatide, not compounded versions. |
Trial results are for FDA-approved tirzepatide. Prices checked November 1, 2026.
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Key takeaways
- In SURMOUNT-1, adults on FDA-approved tirzepatide lost 15.0% to 20.9% of body weight on average over 72 weeks.
- Tirzepatide is a once-weekly shot that acts on two appetite hormones, GIP and
GLP-1 . Eli Lilly sells it as Zepbound. - Dosing steps up slowly: 2.5 mg a week to start, then 2.5 mg steps at least four weeks apart, to 15 mg.
- Side effects are mostly stomach-related: nausea, diarrhea, vomiting and constipation, usually while the dose is going up.
- Zepbound is $299 to $449 a month at LillyDirect; $449 from 7.5 mg needs a refill within 45 days, or it’s $499 to $699.
- Compounded tirzepatide at NexLife is $139 a month on the 12-month plan, at every dose. It isn’t FDA-approved.
How it works
How does tirzepatide work for weight loss?
It quiets hunger. Tirzepatide acts like two gut hormones, GIP and
It slows digestion. Food leaves your stomach more slowly, so you stay full for longer after you eat.
It steadies blood sugar. It helps your body release insulin when blood sugar rises. That’s why Eli Lilly also sells tirzepatide as Mounjaro, for type 2 diabetes.
It works with your habits. In the trials, tirzepatide was paired with a reduced-calorie diet and more activity. Your nutrition plan and coaching call are built for that.
Results
How much weight can you lose on tirzepatide?
- 20.9%average weight loss at 15 mg, over 72 weeks
- 19.5%at 10 mg
- 15.0%at 5 mg
- 3.1%with placebo
In SURMOUNT-1, 2,539 adults with obesity, or overweight with a weight-related condition, took weekly tirzepatide or placebo for 72 weeks alongside diet and exercise. At 15 mg, 91% lost at least 5% of their body weight, compared with 35% on placebo.
In SURMOUNT-5, the head-to-head trial in adults with obesity, tirzepatide led to 20.2% average weight loss over 72 weeks, compared with 13.7% for semaglutide. Tirzepatide vs. semaglutide, compared.
These results are for FDA-approved tirzepatide. Compounded tirzepatide hasn’t been studied in clinical trials, and results vary from person to person.
“However, compounded drugs are not FDA approved. This means the agency does not review compounded drugs for safety, effectiveness or quality before they are marketed.”
U.S. Food and Drug Administration, FDA’s concerns with unapproved GLP-1 drugs used for weight loss
Dosing
What is the tirzepatide dose for weight loss?
With FDA-approved tirzepatide, treatment starts at 2.5 mg once a week for four weeks so your body can adjust. From there a clinician can raise the dose in 2.5 mg steps, at least four weeks apart, up to 15 mg. Your prescriber sets your actual schedule, and not everyone needs the highest dose.
“The recommended starting dosage of ZEPBOUND for all indications is 2.5 mg injected subcutaneously once weekly for 4 weeks.”
Eli Lilly and Company, Zepbound (tirzepatide) prescribing information
- 2.5 mg Starter$139/mo
- 5 mg$139/mo
- 7.5 mg$139/mo
- 10 mg$139/mo
- 12.5 mg$139/mo
- 15 mg Highest dose$139/mo
Weekly dose in mg, and the price per month at each step on the 12-month plan
At NexLife, every step costs the same: $139 a month on a 12-month plan, or $169 month to month, matched if you pay less.† Programs that price by dose charge more as you go up. Ro’s Zepbound, for example, runs from $448 a month at the start to $598 at the highest doses.
Measuring from a vial? Units on a syringe depend on your vial’s strength: see our compounded tirzepatide dosage chart, and follow your pharmacy label.
Dose and vial math
How many units is a tirzepatide dose?
Doses are in milligrams (mg), and your prescription sets yours. Zepbound’s label starts at 2.5 mg once a week. The dose may go up 2.5 mg at a time, after at least 4 weeks on each dose, to 15 mg at most. With a vial, its strength in mg per mL turns your dose into mL and units.
| Dose | Volume at 25 mg/mL (example) | Units on a U-100 syringe |
|---|---|---|
| 2.5 mg | 0.1 mL | 10 units |
| 5 mg | 0.2 mL | 20 units |
| 7.5 mg | 0.3 mL | 30 units |
| 10 mg | 0.4 mL | 40 units |
| 12.5 mg | 0.5 mL | 50 units |
| 15 mg | 0.6 mL | 60 units |
The math: mL = dose ÷ strength (mg per mL); units = mL × 100. So 5 mg ÷ 25 mg/mL = 0.2 mL, or 20 units. 25 mg/mL is only an example: strengths vary from one compounding pharmacy to another, so your vial’s label decides. Zepbound’s own vials work differently: each dose is 0.5 mL (single-dose vial) or 0.6 mL (multi-dose vial). Every strength in one chart: our compounded tirzepatide dosage chart.
Losing weight takes more than a prescription.
Tirzepatide does its part. The rest is a plan you can keep, with people who answer.
- Hunger gets quieter. Tirzepatide acts on two fullness signals, GIP and
GLP-1. - Doses step up. From 2.5 mg, in steps at least four weeks apart.
- Habits still matter. The trials paired tirzepatide with diet and activity.
Not just a medicine. A plan around it.
Personalized weight loss care with tirzepatide: a provider who adjusts your dose, a nutrition plan and coaching.
- $139 a month on the 12-month plan, at every dose. Or $169 month to month. From 2.5 mg to 15 mg, with no membership.
- A plan for the plate. A personalized nutrition plan and a 1:1 coaching call, included.
- A provider who follows your dose. Licensed providers review each step with you.
Real people for every step. Someone picks up 24/7, and physicians answer medical questions during clinical hours. Call or text
Check my eligibilityCompounded, not FDA-approved: a licensed provider prescribes it only when it offers a significant difference for you.
Eligibility
Who qualifies for tirzepatide for weight loss?
- You’re an adult with a BMI of 30 or more
- Or your BMI is 27 or more and you have a weight-related condition, such as high blood pressure, high cholesterol, type 2 diabetes, sleep apnea or heart disease
- You’re ready to pair a weekly injection with changes to how you eat and move
Tirzepatide isn’t for you if you or a family member has had medullary thyroid carcinoma or MEN 2, you’ve had a serious allergic reaction to tirzepatide, or you’re pregnant or planning a pregnancy. Your provider reviews your full history before anything is prescribed.
Side effects
What are tirzepatide’s side effects, and how do you handle them?
The most common side effects are nausea, diarrhea, vomiting, constipation, stomach pain, indigestion, injection-site reactions, tiredness, burping, hair loss and heartburn. In SURMOUNT-1, a trial of FDA-approved tirzepatide, most stomach side effects were mild to moderate and came while the dose was going up; compounded tirzepatide wasn’t studied.
Smaller meals, eating slowly and plenty of water help many people. If side effects linger, your provider can hold your dose or step up more slowly. Questions at 2 a.m.? Call or text
Cost
What does tirzepatide for weight loss cost?
| Route | Per month | What’s included |
|---|---|---|
| Compounded tirzepatide at NexLife | $139 on a 12-month plan, $169 month to month, at every dose Pay less elsewhere? Matched† | Provider, medication, nutrition plan, coaching call, shipping, 24/7 support |
| Zepbound through LillyDirect | $299 at 2.5 mg, $399 at 5 mg, $449 from 7.5 mg to 15 mg with a refill within 45 days ($499 at 7.5 mg and $699 at 10 to 15 mg otherwise) | Medication only (KwikPen or vials); the prescriber visit is extra |
| Zepbound through Ro | $448 to $598 | Includes Ro’s $149 monthly membership |
| Medicare | $50 copay | For eligible Part D enrollees, with prior authorization |
Prices checked November 1, 2026. Compounded tirzepatide isn’t FDA-approved; Zepbound is.
NexLife Price Match Guarantee†. Already on compounded tirzepatide with another licensed provider, and paying less? We match your regular monthly price. How it works
Getting started
Where to buy tirzepatide for weight loss, and how to start online
Answer a few health questions.
Online, in about 3 minutes: your weight history, your health and your goals.
A licensed provider reviews them.
You’re prescribed tirzepatide only if it’s right for you. Here’s how a tirzepatide prescription works online.
Your medication ships.
Our partner pharmacy usually ships within 1 to 2 business days, free.
We stay with you.
Your provider follows your dose, you get a nutrition plan and a 1:1 coaching call, and real people answer 24/7.
“Patients should obtain a prescription from their doctor and fill the prescription at a state-licensed pharmacy.”
U.S. Food and Drug Administration, FDA’s concerns with unapproved GLP-1 drugs used for weight loss
What would you pay with NexLife?
Tap where you are now. We’ll show your NexLife price next to it, or tell you we’ll match it.
Pick one above to see your price.
Prices from each provider’s own site, checked November 1, 2026. Brand-name and compounded medications are different products: compounded medications aren’t FDA-approved, and a provider prescribes one only when it offers a significant difference for you. Price Match Guarantee† terms apply.
What does NexLife cost?
One flat price at every dose.
No membership fee. Provider care, a nutrition plan, coaching and shipping are included. Paying less with another licensed provider? We match your regular monthly price.†
GIP + 12-month plan $139/mo
Tirzepatide
Weekly and dual-action. Care, coaching and shipping included. On a 12-month plan; $169/mo month to month.
Check my eligibilityCompounded, not FDA-approved · Not prescribed? No charge for medication
12-month plan $119/mo
Semaglutide
Weekly
Compounded, not FDA-approved · Not prescribed? No charge for medication
Compounded, not FDA-approved. A licensed provider prescribes it only when it offers a significant difference for you. Vials shown are illustrations. Always use the strength on your pharmacy’s label. Every plan and price · Price Match Guarantee† terms
The NexLife Price Match Guarantee†
Paying less elsewhere?
Keep your price. Upgrade your care.
Already on compounded tirzepatide or semaglutide? Pay less with another licensed U.S. telehealth provider or clinic, and we match your regular monthly price for as long as your plan stays active.† Plus a provider who follows your dose, a nutrition plan, a coaching call and real people 24/7.
- 1Send a receipt from the last 60 days
- 2A NexLife provider reviews your prescription
- 3Pay your matched price, at every dose
Locked while your plan is activeSame price at every doseNo membership fee
†Terms: see the Price Match Guarantee† details below. Compounded medications aren’t FDA-approved; a provider prescribes one only when it offers a significant difference for you.
Tirzepatide for weight loss: your questions
Fair questions about NexLife
- Will my price go up with my dose?
- No. You pay the same at every dose.
- What if I’m not prescribed?
- You aren’t charged for medication.
- Can I cancel?
- Yes, by email. It takes effect 30 days after we receive it. Plans renew until you cancel; our cancellation policy has the details.
- Do I need insurance?
- No. Pay with an HSA or FSA card, or with Affirm, Klarna or Afterpay at checkout.
How much weight can you lose on tirzepatide?
In SURMOUNT-1, the trial behind Zepbound, adults lost 15.0% of their body weight on average at 5 mg, 19.5% at 10 mg and 20.9% at 15 mg over 72 weeks, compared with 3.1% on placebo. Results vary from person to person, and the trial paired tirzepatide with a reduced-calorie diet and more activity. Compounded tirzepatide wasn’t studied.
How fast does tirzepatide work for weight loss?
Think in months, not days. Treatment starts at 2.5 mg for four weeks; blood levels settle after about 4 weeks on a dose, and doses rise in steps at least four weeks apart. In SURMOUNT-1, a trial of FDA-approved tirzepatide, weight kept coming down for most of the 72 weeks; compounded tirzepatide wasn’t studied. The month-by-month timeline.
Is tirzepatide better than semaglutide for weight loss?
On average, yes. In SURMOUNT-5, the head-to-head trial in adults with obesity, people on tirzepatide lost 20.2% of their body weight over 72 weeks, compared with 13.7% on semaglutide; it studied FDA-approved Zepbound and Wegovy, not compounded versions. The right choice also depends on your history, side effects and budget: tirzepatide vs. semaglutide, compared.
Who qualifies for tirzepatide for weight loss?
Zepbound is approved for adults with a BMI of 30 or more, or 27 or more with at least one weight-related condition, such as high blood pressure, type 2 diabetes or sleep apnea. A licensed provider decides after reviewing your history.
What are the side effects of tirzepatide?
The most common are nausea, diarrhea, vomiting, constipation, stomach pain, indigestion, injection-site reactions, tiredness, burping, hair loss and heartburn. Serious but less common risks include pancreatitis, gallbladder problems and, in rodents, thyroid tumors. Here’s what helps, and when to call.
How much does tirzepatide for weight loss cost?
Zepbound costs $299 to $449 a month at LillyDirect, medication only; $449 (7.5 to 15 mg) needs a refill within 45 days, or it’s $499 to $699. Compounded tirzepatide runs $139 to $399 a month online in our price index (checked November 1, 2026). At NexLife it’s $139 a month on the 12-month plan, or $169 month to month.
Is compounded tirzepatide the same as Zepbound?
No. Zepbound is FDA-approved and made by Eli Lilly. Compounded tirzepatide is prepared by a state-licensed pharmacy for your prescription and isn’t FDA-approved. The SURMOUNT trial results are for FDA-approved tirzepatide; compounded tirzepatide wasn’t studied in them. And “tirz” is simply a short name for tirzepatide.
Does tirzepatide help with insulin resistance?
Tirzepatide acts on blood sugar: it helps your body release insulin when blood sugar rises, which is why Eli Lilly also sells it as Mounjaro for type 2 diabetes. For weight loss, Zepbound is approved for adults with a BMI of 30 or more, or 27 or more with a weight-related condition. A licensed provider decides whether it fits you.
Can tirzepatide help if I have sleep apnea?
It may. Zepbound is also FDA-approved for obstructive sleep apnea in adults with obesity, and sleep apnea is one of the weight-related conditions that, with a BMI of 27 or more, can qualify you for tirzepatide for weight loss. A licensed provider decides after reviewing your full history.
What happens when you stop tirzepatide?
Weight often comes back. In SURMOUNT-4, a trial of FDA-approved tirzepatide, adults who switched to placebo after 36 weeks saw their weight rise 14% on average over the next year, while those who stayed on tirzepatide lost another 5.5%; compounded tirzepatide wasn’t studied. Talk with your provider before you stop: they can help you plan the change.
Do you still need to diet and exercise on tirzepatide?
Yes: habits still matter, and the trials paired tirzepatide with diet and activity. In SURMOUNT-1, adults took weekly tirzepatide or placebo for 72 weeks alongside diet and exercise. At NexLife, a personalized nutrition plan and a 1:1 coaching call are included.
How many people on tirzepatide reach 5% weight loss?
In SURMOUNT-1, a 72-week trial of FDA-approved tirzepatide, 91% of adults on 15 mg reached at least 5% weight loss, compared with 35% on placebo. These results are for FDA-approved tirzepatide; compounded tirzepatide hasn’t been studied in clinical trials, and results vary from person to person.
Who shouldn’t take tirzepatide for weight loss?
Tirzepatide isn’t for you if you or a family member has had medullary thyroid carcinoma or MEN 2. It also isn’t for you if you’ve had a serious allergic reaction to it, or if you’re pregnant or planning a pregnancy. Your provider reviews your full history before anything is prescribed.
Important safety information
Compounded tirzepatide and semaglutide are not FDA-approved, and the FDA hasn’t reviewed them for safety, effectiveness or quality. A provider prescribes them only when they offer a significant difference for you compared with an FDA-approved product. Both medicines may cause thyroid tumors, including cancer: don’t use either if you or a family member has had medullary thyroid carcinoma (MTC) or multiple endocrine neoplasia syndrome type 2 (MEN 2).
Read the full safety information
In studies with rodents, both medicines caused thyroid tumors; it isn’t known whether they cause them in people. Tell your provider if you notice a lump or swelling in your neck, hoarseness, trouble swallowing or shortness of breath. Serious side effects can include inflammation of the pancreas (pancreatitis), gallbladder problems, low blood sugar (especially with insulin or sulfonylureas), kidney problems from dehydration, severe stomach problems, serious allergic reactions, vision changes in people with type 2 diabetes, and a faster heart rate. Tell your care team before any surgery or procedure that uses anesthesia or deep sedation. Don’t combine either medicine with other
Tirzepatide can make birth control pills less effective: switch to a non-oral method, or add a barrier method such as condoms, for 4 weeks after you start and for 4 weeks after each dose increase. Both medicines may harm an unborn baby. Semaglutide should be stopped at least 2 months before a planned pregnancy. Tell your provider right away if you’re pregnant, planning to be, or breastfeeding.
This is a summary, not the complete safety information. Read the full Prescribing Information for FDA-approved tirzepatide (Zepbound) and semaglutide (Wegovy), and talk with your provider. You can report side effects to the FDA at
† NexLife Price Match Guarantee: for new NexLife members switching from a licensed U.S. telehealth provider or clinic with an active prescription for compounded tirzepatide or semaglutide. We match your regular all-in monthly price there (medication plus any required membership, program or visit fee, on a month-to-month plan); first-month offers, coupons, referral credits and prepaid multi-month rates aren’t matched. Proof from the last 60 days required. A licensed provider must determine that treatment is right for you. Not open to people with Medicare, Medicaid or TRICARE coverage. Full terms.
About NexLife. NexLife is a telehealth and care-coordination platform. Care is delivered through affiliated, physician-owned medical groups, and licensed providers decide whether treatment is right for you. NexLife doesn’t make or compound medication: state-licensed partner pharmacies fill each prescription, and we coordinate the rest. Available only in states where our affiliated providers are licensed.
“In this trial, those randomized to receive the highest approved dosage of Zepbound (15 mg once weekly) lost on average 18% of their body weight compared to those randomized to placebo.”
Who wrote and medically reviewed this page?
Leads the NexLife Medical Team, which writes and medically reviews NexLife’s guides, including this one.
Checked the Zepbound label, the SURMOUNT-1 and SURMOUNT-5 results in the New England Journal of Medicine, and every price on this page.
- Every fact, sourced. Each price and rule links to the page it comes from.
- How we make money. NexLife is a telehealth and care-coordination platform. We earn revenue when people join NexLife.
- Corrections, fast. See something wrong or out of date? Email care@nexlife.us and we’ll fix it.
Paying less elsewhere? We match it.†
Tirzepatide: $139 a month on 12 months, or $169 month to month.
About 3 minutes of health questions. A licensed provider decides if tirzepatide is right for you.
4.8 out of 5 on Trustpilot · Medical director Adam Kennah, MD (NPI 1144260043) · LegitScript-certified
Compounded medications aren’t FDA-approved. A provider prescribes one only when it offers a significant difference for you.
- 1Tell us about you
Start online with your health history.
- 2A licensed provider decides
Online, following your state’s rules. You’re prescribed only if treatment is right for you.
- 3We ship it, then stay with you
Our partner pharmacy usually ships within 1 to 2 business days. Free shipping, and questions come to us 24/7, never to the pharmacy.
Sources
- Eli Lilly and Company. Zepbound (tirzepatide) prescribing information.
- The New England Journal of Medicine. Tirzepatide once weekly for the treatment of obesity (SURMOUNT-1), 2022.
- The New England Journal of Medicine. Tirzepatide as compared with semaglutide for the treatment of obesity (SURMOUNT-5), 2025.
- Eli Lilly and Company. Zepbound through LillyDirect.
- AJMC. FDA approves monthly KwikPen option for tirzepatide in chronic weight management (February 23, 2026).
- Ro. Weight loss pricing (Zepbound and Wegovy self-pay prices).
- KFF. What to know about the BALANCE Model and the Medicare
GLP-1 Bridge (updated May 11, 2026). - U.S. Food and Drug Administration. FDA’s concerns with unapproved
GLP-1 drugs used for weight loss. - NexLife. Compounded tirzepatide plans.
- Novo Nordisk. Wegovy (semaglutide) prescribing information.
- LegitScript. LegitScript certification record for NexLife.us.
- NexLife. Compounded semaglutide plans.
- Ro: weight loss program pricing. Checked November 1, 2026.
- Hims: Zepbound KwikPen. Checked November 1, 2026.
- Hims: Wegovy pill and pen, with membership. Checked November 1, 2026.
- Mochi Health: FAQs (membership and medication prices). Checked November 1, 2026.
- Embody: compounded tirzepatide, one-month supply. Checked November 1, 2026.
- Embody: compounded semaglutide, one-month supply. Checked November 1, 2026.
- JAMA. Aronne LJ, et al. Continued treatment with tirzepatide for maintenance of weight reduction in adults with obesity: the SURMOUNT-4 randomized clinical trial (January 2, 2024). Checked November 1, 2026.