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Evidence-based GLP-1 & peptide discussion since 2023
ForumsCompounding & FormulationCompounded tirzepatide formulation challenges — looking for input Page 3

Compounded tirzepatide formulation challenges — looking for input

Dr.EndoIndy Tue, Jul 9, 2024 at 8:50 AM 43 replies 2,583 viewsPage 3 of 9
nick_SD_fit
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Jul 9, 2024 at 6:13 PM#11
pat_auckland said:
Steady state is faster than people expect: half-life about five days, so you are at plateau in roughly three to four weeks rather than five.

Thank you — that is the clearest version of this I have read, and I have read a lot of them.

Last edited: Jul 9, 2024 at 8:13 PM
29 4SkepticalSean, Dr.CardioMD, EndoResFellow and 26 others
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DebRD_ATL
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Jul 9, 2024 at 9:51 PM#12

Clinical perspective, offered as context rather than as advice.

Dose-response modeling for tirzepatide: Emax model fitting to the STEP/SURMOUNT dose-finding data shows:

Semaglutide: ED50 ≈ 0.6mg, Emax ≈ -18%, Hill coefficient ≈ 1.3
Tirzepatide: ED50 ≈ 6mg, Emax ≈ -25%, Hill coefficient ≈ 1.5

Clinical implication: most patients achieve >80% of maximal response by the mid-range dose (1.7mg sema, 10mg tirz). Going to the maximum dose provides diminishing returns — possibly not worth the additional side effect burden for some patients. Individualize dosing based on response vs tolerability.

Last edited: Jul 10, 2024 at 1:51 AM
28 3RegAffairsDC, BiostatsBrad, PeptideSynthNJ and 25 others
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CarlaRPh_TPA
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Jul 10, 2024 at 1:29 AM#13
SleepDoc_PDX said:
Resolution therefore closed the doors unevenly, and the asymmetry follows from the bulks lists.

I read this differently from SleepDoc_PDX, on substance rather than tone. A research-chemical supplier selling lyophilised powder labelled research use only is not compounding and is not claiming to. It is a different legal universe with no pharmacy oversight, no patient relationship and no content guarantee, and conflating the two in these threads helps nobody.

Last edited: Jul 10, 2024 at 5:29 AM
27 2BrianDallas92, labquiet_amy, emily_PDX and 24 others
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VendorMark
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Jul 10, 2024 at 5:07 AM#14

The figures, for anyone assembling their own picture. The boring version of this is the one that works, and the boring version is: measure a baseline, change one variable, wait, measure again under the same conditions. Nobody wants that answer and it is still the answer.

Last edited: Jul 10, 2024 at 7:07 AM
26 1Dr.PeteFamMed, claudia_zurich, nancy_portland and 23 others
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mike_mod
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Jul 10, 2024 at 8:45 AM#15

Moderator note: the sourcing question belongs in the vendor section and has been split out. No action needed from anybody.

25 0PurityPaulOR, MaxMetOK, MounjBrad and 22 others
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