Semaglutide vs Tirzepatide Cost Per Pound Lost: A Value Breakdown
Brand-name GLP-1 injections are potent-but pricey. We calculated the dollars each drug costs per pound of weight you can expect to lose and compared those figures with Rx.com’s $99 and $149 compounded plans.
At 2026 cash prices, a year of Wegovy (semaglutide) runs around $4,188, while Zepbound (tirzepatide) tops $8,388. Divide those numbers by the average weight lost in pivotal trials-about 34 lb for semaglutide and 52 lb for tirzepatide-and the cost works out to roughly $124 versus $161 per pound, respectively. By contrast, Rx.com’s compounded semaglutide from $99/month and compounded tirzepatide from $149/month bring the cost per pound below $35, making physician-supervised telehealth one of the most cost-efficient ways to access GLP-1 therapy without insurance.
- STEP 1 trial participants lost an average of 15.3 kg (33.7 lb) or 14.9 % of body weight with semaglutide 2.4 mg over 68 weeks. (nejm.org)
- Wegovy’s reduced self-pay price is $349 per four-week fill through at least December 31, 2026. (novocare.com)
- Zepbound’s list price for the 10–15 mg maintenance pens is $699 per month. (zepbound.lilly.com)
- Rx.com offers compounded semaglutide from $99/month and compounded tirzepatide from $149/month with a 12-month plan, online visit and shipping included.
- Averages mask wide variation: people who lose less than 5 % of body weight will pay far more per pound than high responders who exceed 20 %.
Cost per pound lost shows bang for your buck
Cost per pound lost is simply the total amount you pay for medication in a given period divided by the average pounds you shed during that same period. The metric helps shoppers compare the “value” of competing weight-loss drugs without getting lost in list prices or percent numbers.
Semaglutide is a glucagon-like peptide-1 (GLP-1) receptor agonist originally approved for diabetes and later, at the 2.4 mg dose sold as Wegovy, for chronic weight management.
Tirzepatide is a dual GLP-1 / GIP receptor agonist (a “twincretin”) approved as Zepbound for obesity in November 2024 following its diabetes approval as Mounjaro.
Semaglutide vs tirzepatide: head-to-head weight-loss data
Clinical trials provide the most reliable averages we can use for cost math. Here are the flagship results regulators relied on:
| Trial (duration) | Drug & Dose | Mean weight lost | % of body weight |
|---|---|---|---|
| STEP 1 (68 wks) | Semaglutide 2.4 mg | 15.3 kg (33.7 lb) | 14.9 % |
| SURMOUNT-1 (72 wks) | Tirzepatide 15 mg | 23.6 kg (52 lb) | 22.5 % |
Although the studies were not run head-to-head, statistical modeling shows tirzepatide yields significantly greater average weight loss than semaglutide at higher maintenance doses. (pubmed.ncbi.nlm.nih.gov)
2026 self-pay price tags
Sticker prices dropped in 2026, but brands still cost hundreds per month. The table below summarizes cash prices without insurance:
| Medication | Monthly self-pay price | Source |
|---|---|---|
| Wegovy (all doses up to 2.4 mg) | $349 | Novo Nordisk limited-time offer through 12/31/26 (novocare.com) |
| Zepbound (10–15 mg pens) | $699 | Eli Lilly list price 2026 (zepbound.lilly.com) |
| Rx.com compounded semaglutide | $99 | 12-month plan (visit + shipping included) |
| Rx.com compounded tirzepatide | $149 | 12-month plan (visit + shipping included) |
⚠️ Why brands still matter
Only Wegovy and Zepbound are FDA-approved for weight loss. Compounds are legal 503A preparations made for individual patients when prescribers determine a clinical need that the branded option cannot meet.
Crunching the dollars-per-pound math
Using 12 months of therapy and the mean pounds lost, here’s how the value stacks up:
| Scenario | 12-month drug spend | Pounds lost | Cost per pound |
|---|---|---|---|
| Wegovy at $349/month | $4,188 | 34 lb | $124 |
| Zepbound at $699/month | $8,388 | 52 lb | $161 |
| Rx.com compounded semaglutide at $99/month | $1,188 | 34 lb | $35 |
| Rx.com compounded tirzepatide at $149/month | $1,788 | 52 lb | $34 |
The takeaway: tirzepatide delivers more pounds but costs so much more per month that its value advantage disappears unless you lose substantially above the average.
Real-world cost per pound can swing widely
Your personal number may look nothing like the trial averages. Several factors push the ratio up or down:
Response variability: In STEP 1, one in five participants lost less than 10 %; others lost more than 20 %. Lower responders can pay double per pound compared with high responders.
Insurance coverage: A manufacturer savings card that drops your copay to $25 changes the metric dramatically and can make brand drugs cheaper than compounds.
Up-dosing time: Both drugs require a 16–20-week titration during which you pay full price but lose weight more slowly, raising early cost per pound.
Side-effect interruptions: Missed or delayed doses after nausea or supply shortages inflate the numerator with no change in the denominator.
For a more personalized projection, try the 12-month GLP-1 cost calculator.
Eight ways to lower your GLP-1 cost
Compare pharmacy cash prices: Use Rx.com’s free discount card to check local quotes instantly.
Manufacturer copay cards: Eligible commercial patients can pay as little as $25 a month for Wegovy or Zepbound.
Patient assistance programs: If your income is below 400 % of the federal poverty line, check Novo Nordisk and Lilly foundations.
Compounded alternatives: When insurance is denied, Rx.com’s $99/first-month semaglutide offer can bridge the gap while you appeal.
Annual pre-pay discounts: Some clinics offer 10–20 % breaks for paying six months up front, but read the fine print for dose-upcharge clauses. Rx.com bundles all doses at one price.
Health Savings Accounts (HSA/FSA): Most plans let you reimburse GLP-1 receipts with pre-tax dollars.
Lifestyle boosters: A high-protein diet and resistance training maximize fat loss, reducing the time you need pharmacotherapy (protein guide).
Switch drugs strategically: Plateau on semaglutide? You might pay less per pound moving to tirzepatide if you expect larger incremental loss (switching guide).
Is a compounded GLP-1 the best value for you right now?
Check the column that fits your situation:
✅ Go compounded
- Commercial insurance excludes Wegovy or Zepbound
- You tolerate GLP-1 side effects well
- You prefer telehealth and home delivery
- You understand compounds are not FDA-approved
🏥 Stick with brand or see a specialist
- Insurance covers brand with a low copay
- You need weekly in-clinic monitoring
- Pregnant, breastfeeding, or planning pregnancy
- History of medullary thyroid cancer or MEN 2
🚨 When to Contact Your Healthcare Provider
Contact your doctor immediately if you experience any of the following:
- Severe stomach pain - may signal pancreatitis or gallstones
- Persistent vomiting - risk of dehydration and electrolyte imbalance
- Difficulty swallowing or neck swelling - possible thyroid tumor
- Vision changes - rare diabetic retinopathy complications
- Signs of allergic reaction - rash, swelling of face/tongue, trouble breathing
- Thoughts of self-harm - mood changes have been reported; call or text 988 if in crisis
- Severe constipation lasting >1 week - may lead to bowel obstruction
- Dark urine or yellowing eyes/skin - could signal gallbladder or liver issues
Scientific References
- Wilding JP et al. Once-Weekly Semaglutide in Adults with Overweight or Obesity. N Engl J Med. 2021;384:989-1002.
- Jastreboff AM et al. Tirzepatide Once Weekly for the Treatment of Obesity. N Engl J Med. 2022;387:205-216.
- Hendrickson R et al. Tirzepatide: The First Twincretin. Diabetes Ther. 2023;14:1887-1904.
- Novo Nordisk. Wegovy Self-Pay Offer Details, 2026.
- Eli Lilly. Zepbound Savings & Pricing Information, 2026.
- Zhang T et al. Indirect Treatment Comparison of Tirzepatide and Semaglutide for Obesity. Obesity Rev. 2023;24:e13493.
Frequently Asked Questions
Is tirzepatide always more expensive than semaglutide?
At current 2026 list prices, yes-Zepbound’s $699 list price is roughly double Wegovy’s promotional $349. However, insurance coverage or a copay card can flip the equation for individual patients.
Does the cost per pound improve in year 2?
Usually. Most people continue losing, albeit more slowly, while dose and monthly cost stay flat, so each additional pound makes the cumulative dollars-per-pound figure drop.
How accurate are trial averages for real life?
They provide a reasonable midpoint, but real-world adherence, lifestyle factors and dose interruptions make individual outcomes range from negligible to more than 30 % body-weight loss.
Can I switch from semaglutide to tirzepatide if I plateau?
Yes. Clinicians often switch after at least 6 months at the highest tolerable semaglutide dose. Expect to restart titration when changing molecules.
Are compounded GLP-1s safe?
They can be when sourced from a reputable 503A pharmacy and prescribed by a licensed provider, but they are not FDA-approved and lack large-scale safety data. Discuss risks with your clinician.
Will Medicare cover Wegovy or Zepbound?
Not yet. As of October 2026, Medicare Part D cannot cover anti-obesity medications by statute, though legislative proposals are pending.
What happens to cost per pound if I regain weight after stopping?
The numerator (total spend) stays the same while the denominator (net pounds lost) shrinks, so cost per pound balloons-one reason many clinicians recommend long-term maintenance dosing.
