Zepbound vs. Compounded Tirzepatide: Are They Same?

cTirzepatide, custom-made by a pharmacist, plays a crucial role during Zepbound shortages.

Medically Reviewed By Mostafa Elhennawy MS, Pharm D

Eli Lilly’s Zepbound, an injectable prescription weight loss medication containing Tirzepatide, is clinically proven to lead to a substantial reduction of body weight.

Compounded Tirzepatide (cTirzepatide) has grown in popularity due to the limited availability of Zepbound which has been on the FDA’s shortage list for months. 

This opened an opportunity for pharmacies, IV infusion clinics, telehealth entrepreneurs and medical spas to fill the gap by producing cTirzepatide, “essentially a copy” of its commercial counterpart for a fraction of the cost.

In this article, we will outline the differences between cTirzepatide and Zepbound.

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What are Zepbound and Compounded Tirzepatide?

Zepbound is:

cTirzepatide is:

  • An effective substitute/equivalent of branded medicine custom-made by pharmacists.
  • Produced if its active ingredients are on the FDA’s shortage list.

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Difference Between Zepbound and Compounded Tirzepatide

Regulatory aspects and manufacturing processes are different for Zepbound and cTirzepatide.

On the federal level, compounding pharmacies (make medications for specific patients) and outsourcing facilities (bulk manufacturing medications) are regulated by Section 503A and Section 503B of The FDA Food, Drug, and Cosmetic Act, respectively. Compounders must comply with high standards for quality of ingredients and sanitary manufacturing conditions, but they are not obliged to register with the FDA. Licensing and oversight of compounding pharmacies falls to states. 

Chemical Composition and Formulation

Essentially, Zepbound and cTirzepatide should have the same chemical composition:

  1. Tirzepatide is a dual GLP-1/GIP agonist, more potent than Novo Nordisk’s GLP-1 agonist Semaglutide. GLP-1 is enhancing insulin secretion and inhibiting glucagon release while simultaneously delaying gastric emptying. GIP enhances GLP-1 effects, aids fat burning and stimulates brain areas that control appetite and satiety. 
  2. Pharmacists create cTirzepatide by reformulating the active ingredients in a commercial drug.

However, formulation differs to certain extent:

  • All ingredients listed in the Zepbound’s labeling are standardized and the same in each injection.
  • cTirzepatide can contain additional ingredients, such as vitamin B12, that enhance the drug’s effectiveness.

For insights into the storage requirements of cTirzepatide visit Store Compounded Tirzepatide.

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Side Effects and Safety Profiles

In general, Zepbound and cTirzepatide share side effect profile. However, additional ingredients can be added to cTirzepatide to minimize side effects. 

The most common side effects which mostly improve over time are nausea, abdominal pain, constipation, diarrhea, vomiting and injection site reactions.

Serious side effects that require immediate medical attention are allergic reactions, kidney and vision problems, pancreatitis, gallbladder disease, hypoglycemia and thyroid tumor.

Usage and Dosage Recommendations

Zepbound is a once-a-week, single-dose injectable pen, while cTirzepatide injections are typically dispensed as vials.

  • Zepbound and cTirzepatide are administered as a subcutaneous injection in the upper arm, abdomen or thigh on the same day of the week each week.
  • The starting dose, 2.5 mg/week, is gradually increased by 2.5 mg every 4 weeks until the maintenance dose is reached (5 mg, 10 mg or 15 mg). 
  • cTirzepatide doses can be individualized based on the doctor’s advice.

Cost and Accessibility

  • The list price for Zepbound is $1,059.87 for a 4-week supply. The final price varies depending on insurance coverage, dosage and treatment plan, the prescribed quantity, availability of savings programs, such as Zepbound Savings Card and pharmacy discounts. 
  • cTirzepatide is $100-$225 per injection depending on the dose. 

When exploring options for weight loss treatments, comparing compounded Tirzepatide with Mounjaro can be insightful.

Is Compounded Tirzepatide the Same As Zepbound?

Since cTirzepatide is tailor-made by a pharmacist it is not the same as Zepbound. 

Frequently Asked Questions

Is Compounded Tirzepatide As Effective As Zepbound?

Most of the cTirzepatide users are satisfied with the weight loss results, but there are no clinical studies showing its effectiveness.

Is There a Compounded Version of Zepbound?

“Compounded Zepbound” is most likely sourced overseas, typically from China, and not considered safe.

Is Zepbound Pure Tirzepatide?

The preparation method of Tirzepatide for production of Zepbound ensures that the active ingredient is pure.

Key Takeaways

 

cTirzepatide, custom-made by a pharmacist, plays a crucial role during Zepbound shortages.

Compounders are making their own version of Zepbound by combining pharmaceutical-grade active ingredients with inactive ingredients whose type and amount can vary.

cTirzepatide is not inspected by the FDA for quality, safety or effectiveness. 

Patients are responsible to investigate whether the medications they’re taking were made by a licensed and reputable compounder.

Unauthorized and Counterfeit Tirzepatide are illegal and can pose serious health risks.

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