Updated 7 October 2026.
The short answer: compounded semaglutide and compounded tirzepatide are both once-weekly injections prescribed for weight management. Semaglutide acts on one hormone pathway (GLP-1). Tirzepatide acts on two (GLP-1 and GIP). They start at different doses, step up on different ladders, and cost different amounts. Which one fits you is a decision a licensed provider makes with you, based on your health history.
Key takeaways
- Semaglutide is a GLP-1 medicine. Tirzepatide is a GLP-1 and GIP medicine. Both are injected once a week.
- Both start low and step up slowly, and the side effects to watch for are similar.
- Compounded versions are not approved by the FDA and are not generics of the brand-name versions.
- At Happy Care Meds, compounded semaglutide starts at $119 a month and compounded tirzepatide at $139, priced by dose, with no membership fee.
How they work
Semaglutide: one pathway
Semaglutide is modeled on GLP-1, a hormone the gut releases after a meal. GLP-1 signals to the brain and the digestive system, and it plays a part in appetite, how quickly the stomach empties and how the body handles blood sugar.
Tirzepatide: two pathways
Tirzepatide acts on the same GLP-1 receptor and also on the receptor for a second gut hormone, GIP (glucose-dependent insulinotropic polypeptide). That is why it is sometimes called a dual agonist. It is a newer molecule than semaglutide.
What compounded means here
Both medicines exist as brand-name products made by their manufacturers, which went through the FDA’s full review. Compounded semaglutide and compounded tirzepatide are prepared by a state-licensed pharmacy for one patient, on a prescription. They are not approved by the FDA, and they are not generics of the brand-name versions.
Dosing schedules
Both are injected once a week, on one chosen weekday, under the skin. Both start at a low dose and step up gradually, usually every 4 weeks, so your body has time to adjust. Your provider decides whether and when to step up, and many people stay on a dose that suits them rather than climbing to the top.
These are the dose steps we offer:
| Compounded semaglutide | Compounded tirzepatide | |
|---|---|---|
| How often | Once a week | Once a week |
| Starting dose | 0.25 mg | 2.5 mg |
| Dose steps | 0.25, 0.5, 1, 1.5, 2.5 mg | 2.5, 5, 7.5, 10, 12.5, 15 mg |
| Who sets the dose | Your provider | Your provider |
The milligram numbers are not comparable between the two. A 2.5 mg dose of tirzepatide is a starting dose, while 2.5 mg of semaglutide is the top of our ladder. The two molecules are simply dosed on different scales.
Side effects to discuss
Because both medicines slow digestion, the side effects people report most are similar and are usually stomach-related: nausea, diarrhea, constipation, vomiting, heartburn and a lower appetite. They tend to show up most when a dose goes up. Starting low and stepping up slowly is the main way providers try to keep them manageable.
The prescribing information for the brand-name versions also lists less common but serious risks, and your provider will ask questions about them. These include inflammation of the pancreas, gallbladder problems, low blood sugar when combined with some diabetes medicines, and kidney strain from dehydration if you are losing fluids. Both brand-name versions carry a warning about thyroid C-cell tumors, so providers ask about any personal or family history of medullary thyroid cancer or MEN 2. Neither is used during pregnancy.
Tell your provider about every medicine you take. Stop and seek medical care right away if you have severe stomach pain that does not go away, signs of an allergic reaction, or a lump or swelling in your neck.
Cost side by side
Compounded tirzepatide costs more than compounded semaglutide at every step. Both are priced by dose, so the price changes as your provider adjusts your dose. These are our prices, which include the provider review, the medication and shipping, with no membership fee.
| Compounded semaglutide | Compounded tirzepatide | |
|---|---|---|
| 1 month, by dose | $119 (0.25 or 0.5 mg) $129 (1 mg) $139 (1.5 or 2.5 mg) |
$139 (2.5 mg) $159 (5 mg) $179 (7.5 mg) $199 (10 or 12.5 mg) $209 (15 mg) |
| 12 weeks | $249 to $319 (from $83 a month) | $299 to $529 (from $100 a month) |
| Membership fee | None | None |
For a full breakdown, including what other services add on top, see how much compounded GLP-1 treatment costs.
How the choice gets made
Price and convenience are your call. Which medicine is medically appropriate is the provider’s. When a licensed provider reviews your questionnaire, they typically weigh:
- Your health history. Conditions such as past pancreatitis, gallbladder disease, kidney problems or thyroid cancer history affect whether either medicine is suitable.
- Your current medicines. Especially diabetes medicines, which can interact with both.
- What you have taken before. If you used one of them in the past, how you tolerated it matters.
- Your preference and budget. If both are appropriate, cost is a fair reason to start with one over the other.
A provider may also decide that neither is right for you. That is a normal outcome of a real medical review.
Wherever you get either medicine, check the seller first. Our guide on where to buy tirzepatide safely covers the checks, and they apply to semaglutide too.
How Happy Care Meds does it
- One short online questionnaire covers both. A US-licensed provider reviews it and decides which, if either, is appropriate.
- Medication compounded by a state-licensed US 503A pharmacy, with your name on the label, shipped to your door.
- LegitScript certified (ID 30294014).
- Priced by dose: semaglutide from $119 and tirzepatide from $139 for the first month. No membership fee and no visit fee.
- Your card is held at checkout and only charged if the provider approves you.
What to ask your provider
Bring these to your visit. A good provider will answer every one.
- Based on my history, which of the two fits me better, and why?
- What starting dose and step-up plan do you suggest?
- What should I do if side effects get worse at a higher dose?
- If one does not suit me, how would switching to the other work?
Frequently asked questions
What is the main difference between tirzepatide and semaglutide?
Semaglutide acts on the GLP-1 receptor. Tirzepatide acts on the GLP-1 receptor and the GIP receptor. Both are injected once a week and both are prescription medicines.
Can I switch from semaglutide to tirzepatide?
Sometimes. A provider decides whether a switch makes sense and what dose to start on. Do not switch or combine them on your own.
Are compounded versions the same as the brand-name versions?
No. They contain the same active ingredient, but they are made by a compounding pharmacy for individual patients and are not approved by the FDA. They are not generics of the brand-name versions.
Why does tirzepatide cost more?
Our prices follow what each medicine costs us at each dose, and tirzepatide costs more at every step. Both are priced by dose, so your cost depends on the dose your provider prescribes.
Do I have to choose before I start the questionnaire?
No. You can tell us your preference, and the provider makes the final call based on your answers.
Sources
- FDA: concerns with unapproved GLP-1 drugs used for weight loss
- MedlinePlus (NIH): semaglutide injection
- MedlinePlus (NIH): tirzepatide injection
- FDA: dosing errors with compounded injectable products
Compounded products are not approved nor evaluated for safety, effectiveness, or quality by the FDA. This article is general information, not medical advice. Talk to a licensed provider about whether semaglutide or tirzepatide is right for you.