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c/tirzepatide·posted 1 months ago by u/kaia_cabrera

anyone else notice tirzepatide kicking in around week 13

Results Long Haul ×5 Well Actually ×3 Sourced ×1

anyone else notice tirzepatide kicking in around week 13, logged the same way every week so the comparison is at least internally fair.

The four-week interval in the label is a minimum. Nothing about the pharmacology requires you to step on schedule, and the trials stepped on a calendar because trials have to.

It is a dual GIP and GLP-1 receptor agonist, and the GIP arm is the part that has no equivalent in the semaglutide threads. That is why the side-effect profile reads differently rather than just milder.

Would rather be corrected in public than confident in private.

3,959 up / 495 down89% upvoted23 commentsid ooio8w5 Jun 2026

23 comments

16 in this archive, depth 6

best — the order this archive was captured in

u/tarek_kirchner249 points·1 months ago

Weekly dosing again, half-life in the same neighbourhood as sema, so a step change takes about a month to reach steady state. Judging a new step at day five is judging noise.

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u/marit_sandvik190 points·1 months ago

Research-use-only material is not approved for human use. Anything in this thread about how a research vial "should" titrate is a discussion about chemistry, not a plan.

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u/signe_villalobos77 points·1 months ago

Yes. I stepped to 12.5 because the calendar said so, not because anything needed fixing, and I regretted it for a fortnight.

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u/marit_sandvik-26 points·1 months ago

This matches mine. Milder constipation than I expected, and what there was settled inside a fortnight of each step.

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u/kaia_cabrera22 points·1 months ago

stepping every four weeks is a ceiling on speed, not a schedule you must hit

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[removed]16 points·1 months ago

[removed by moderator]

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u/georgi_chowdhury140 points·1 months ago

SURMOUNT-1 ran 72 weeks with the top arm around 21% mean body weight change. SURPASS is the diabetes programme and reports glycaemic endpoints, so quoting the two interchangeably is a category error.

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u/titration_marshalMOD91 points·1 months ago

Removed the conversion table. There is no published equivalence between the two molecules and posting one as fact is exactly the kind of thing that gets copied for years.

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u/incretin_ivypharmacology77 points·1 months ago

SURMOUNT-1 ran 72 weeks with the top arm around 21% mean body weight change.

Not sure about this bit. The GIP arm being real does not tell you that it is what caused your particular week.

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u/crosspost_bot_no54 points·1 months ago

The thing nobody warned me about was how much of this is logistics — storing it, remembering it, the same day every week.

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u/ewan_marchand33 points·1 months ago

The thing nobody warned me about was how much of this is logistics — storing it, remembering it, the same day every week.

Saving this one. It is the clearest statement of the stall problem I have read here.

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About c/tirzepatide

Tirzepatide-specific discussion: the dual-agonist pharmacology, the 2.5 → 15mg ladder, the appetite profile people describe as different from semaglutide, and the SURMOUNT/SURPASS trial programme. Comparisons with semaglutide are welcome as long as they are specific about dose equivalence being unknown.

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