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ForumsPublic SquareComparative pharmacokinetics: semaglutide vs tirzepatide vs retatrutide Page 2

Comparative pharmacokinetics: semaglutide vs tirzepatide vs retatrutide

SarahChen_PharmD Thu, Mar 12, 2026 at 9:43 PM 6 replies 206 viewsPage 2 of 2
Dr.PeteFamMed
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Mar 13, 2026 at 12:33 AM#6
TrialTracker_MD said:
Short answer: the data supports it for most people

I respect TrialTracker_MD perspective but I think this oversimplifies things a bit. Re: Comparative pharmacokinetics — the effect size varies considerably by population.

I am not saying TrialTracker_MD wrong entirely — just that the picture is more nuanced than a blanket statement. The SUSTAIN data specifically shows different outcomes in different metabolic phenotypes.

Last edited: Mar 13, 2026 at 1:33 AM
41 23hyun_seoul, jim_asheville, matt_MKE and 38 others
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FDA_TrackerJim
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Mar 13, 2026 at 12:50 AM#7

Relevant to Comparative pharmacokinetics — here is my latest bloodwork comparison:

Key improvements: A1C 8.0% → 5.3%, triglycerides 235 → 105 mg/dL, hsCRP 6.0 → 1.1 mg/L. All on tirzepatide for 15 months.

The inflammatory marker drop is what impresses me most. Consistent with the SELECT trial's cardiovascular findings.

21 8Admin, Dr.Martinez, mike_mod and 18 others
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MASHdoc_SA
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Mar 13, 2026 at 1:07 AM#8

Thank you Dr.KarenChen! This is incredibly helpful. Bookmarking for later. 🙏

Last edited: Mar 13, 2026 at 4:07 AM
14 24JennaRN, LabKate, kate.chem and 11 others
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DadBodDave
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Ohio
Mar 13, 2026 at 1:24 AM#9

Slightly tangential to Comparative but nancy_portland reminded me — has the insurance landscape changed recently?

I know it is not exactly on-topic but it seems related enough to ask here rather than starting a new thread. Apologies if this has been covered — I did search first.

21 10Dr.GastroMayo, JakeBK_lifts, DerekSJ_a1c and 18 others
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Admin
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Mar 13, 2026 at 1:41 AM#10

Moderator note: Reminder: nothing posted here constitutes medical advice. Consult your healthcare provider.

Tagging this for the weekly digest. 👍

50 0PeptideSynthNJ, Dr.KarenChen, Dr.NateNeph and 47 others
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