Key takeaways
- Compounded tirzepatide contains the same active ingredient as Mounjaro but may differ in quality, ingredients, and dosage.
- The Food and Drug Administration (FDA) does not regulate the safety, effectiveness, or quality of compounded medications.
- Compounded tirzepatide may be available when FDA-approved tirzepatide is in shortage or when Mounjaro cannot meet an individual’s medical needs.
Mounjaro is a brand-name prescription drug that contains the active ingredient tirzepatide. It is not available as a generic, but there may be cases where the active ingredient can be compounded.
Drug compounding is a process in which a licensed pharmacist creates a custom alternative to an FDA-approved drug. (You still need a doctor’s prescription to get compounded tirzepatide.)
Continue reading to learn what compounded tirzepatide is and how it compares with Mounjaro.
The compounded drug contains the same active ingredient as the FDA-approved drug. But it might differ from the FDA-approved drug in quality, ingredients, dosage, and form. So compounded tirzepatide is not the same as Mounjaro.
Dosage
The recommended starting dosage for Mounjaro is 2.5 milligrams (mg) once weekly. Your doctor may increase your dosage in increments up to a maximum dose of 15 mg once weekly.
Compounded tirzepatide has no standard dosage, and its dosage could differ from the dosage of Mounjaro. The FDA has received
Side effects
The FDA has received reports of side effects that may relate to compounded tirzepatide. They are similar to those seen with Mounjaro:
- nausea
- vomiting
- diarrhea
- abdominal pain
- constipation
Cost
Some compounded drugs may be less expensive than FDA-approved drugs, but insurance may not cover compounded drugs.
Talk with your insurance provider or doctor about costs and possible coverage.
Effectiveness
Compounded tirzepatide has not undergone the same clinical testing as Mounjaro. This means compounded tirzepatide has no clinical evidence on its effectiveness for weight loss.
Mounjaro may reduce body weight in people with type 2 diabetes. But the FDA
Compounded tirzepatide is not approved by the FDA. This means the FDA
Improper compounding practices may result in contamination or cause the drug to contain the wrong quantities of the active ingredient. Either situation could be dangerous.
In fact, the FDA has
Unlike FDA-approved drugs, compounded tirzepatide won’t come with a package insert when the prescription is dispensed. It’s important to discuss using compounded tirzepatide with a doctor before you begin treatment with it.
A specialty pharmacy provides medications for complex health needs. Some specialty pharmacies or other state-licensed pharmacies
Because compounded drugs are custom-made, a prescription for a compounded drug may take longer to fill than a prescription for an FDA-approved drug. It’s important to research a pharmacy before purchasing any compounded drugs. You can also ask a healthcare professional for their recommendations.
Reasons you may need to have an FDA-approved drug compounded
- You have an allergy to an ingredient in the FDA-approved drug, which the compounded drug can avoid.
- You cannot take the FDA-approved drug in its form (such as an injection) and need an alternative form.
- The FDA-approved drug is not medically appropriate for you to take.
- The FDA has declared a shortage of the FDA-approved drug and is allowing pharmacies to provide compounded versions.
Although shortages of brand-name tirzepatide injections have occurred, the FDA declared the shortage resolved in 2024. At that time, the FDA
When an FDA-approved drug is in shortage, compounders
If FDA-approved tirzepatide injections return to the FDA’s drug shortage list, compounders
Below is a table with a quick comparison of compounded tirzepatide and Mounjaro.
no
yes
FDA does not regulate the safety, effectiveness, or quality of compounded drugs
safety, effectiveness, or quality regulated by the FDA
yes
yes
similar to Mounjaro
more common side effects are digestive side effects, such as nausea or vomiting
some compounded drugs may be less expensive, but insurance may not cover compounded drugs
depends on insurance coverage
Talk with your doctor about the risks and benefits of Mounjaro and compounded tirzepatide. If you cannot take Mounjaro for medical reasons, you may need compounded tirzepatide.
Disclaimer: While Healthline strives for factual, comprehensive, and current information, this article is not a substitute for a licensed healthcare professional’s expertise. Always consult a doctor before taking or discontinuing any medication. Drug information is subject to change and may not cover all uses, directions, precautions, warnings, interactions, reactions, or adverse effects. The lack of a warning does not guarantee a drug’s safety, effectiveness, or appropriateness for all patients or specific uses. Learn more about our approach to content integrity.