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ForumsTirzepatide (Mounjaro / Zepbound)Mounjaro pen vs compounded vial - pros and cons? — July 2024 Page 5

Mounjaro pen vs compounded vial - pros and cons? — July 2024

kate.chem Sat, Aug 16, 2025 at 2:23 PM 37 replies 1,520 viewsPage 5 of 8
BethLabQueen
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Sep 14, 2025 at 10:41 AM#21
InsuranceTom said:
Agreed on the mechanism, with the caveat that the head-to-head used semaglutide 1mg, not 2.4mg.

This matches mine closely enough to be worth saying so out loud.

27 2maya_sedona, stefan_berlin, Dr.EM_Chicago and 24 others
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JessicaM_2024
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Sep 26, 2025 at 2:41 AM#22
InsuranceTom said:
Agreed on the mechanism, with the caveat that the head-to-head used semaglutide 1mg, not 2.4mg.

There is a second half to this that has not been said yet. SURMOUNT-1 landed around 20.9% mean weight loss at 15mg over 72 weeks, against roughly 15% for semaglutide 2.4mg in STEP 1. Different trials, different populations, so the comparison is indicative rather than decisive — but SURPASS-2 was a genuine head-to-head and it pointed the same way.

Worth separating that from tirzepatide, which this thread keeps folding into the same question. They behave differently and the advice does not transfer.

26 1NicoleRaleigh, james_edin, FranDenver and 23 others
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BiostatsBrad
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Oct 7, 2025 at 6:47 PM#23
InsuranceTom said:
Agreed on the mechanism, with the caveat that the head-to-head used semaglutide 1mg, not 2.4mg.

GMP compliance checklist relevant to compounded supply compounding quality:

  • Clean room environment with HEPA filtration
  • Environmental monitoring (viable and non-viable)
  • Personnel training and competency assessment
  • Validated analytical methods for testing
  • Stability testing program
  • Complete batch records and traceability
  • Quality management system with deviation handling

A 503B pharmacy following cGMP should be able to answer questions about ALL of these if you ask. Don't be afraid to ask — it's your health.

25 0FranDenver, Dr.BariatricHTX, LindaRN_retired and 22 others
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JenPlateau
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Oct 19, 2025 at 11:00 AM#24

One thing that is still open after InsuranceTom’s answer:

How much of the tirzepatide advantage is the GIP component and how much is simply that the dose ladder goes higher in receptor-occupancy terms?

Last edited: Oct 19, 2025 at 5:00 PM
24 24FitDadDave, RunnerRach, TrialNerd_Beth and 21 others
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pam_columbus
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Oct 31, 2025 at 3:20 AM#25
BiostatsBrad said:
GMP compliance checklist relevant to compounded supply compounding quality: Clean room environment with HEPA filtration Environmental monitoring…

I have been on both brand and compounded, and in the context of compounded supply, my experience has been equivalent with both. The key is finding a reliable 503B pharmacy with independent testing.

Last edited: Oct 31, 2025 at 9:20 AM
23 23emma_london, tammy_FL, Dr.LipidDallas and 20 others
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