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c/tirzepatide·posted 11 days ago by u/ferran_mensah

GIP agonism explained like i am five, please

Lab Clean Column ×2 Cold Box ×1

GIP agonism explained like i am five, please — a position I have arrived at slowly and would like tested.

Vials and pens carry the same molecule; what differs is fill volume, device tolerance and whether you are doing your own arithmetic. Neither is inherently more accurate.

Held 7.5 for five months. Everyone kept asking when I was going to 10. The answer was never, because 7.5 was working.

The distribution matters more than the mean. In the trial population the interquartile spread was wide enough that two honest people can have completely different runs on the same arm.

Ask me anything specific. Anything general I will probably get wrong.

8,278 up / 6,118 down58% upvoted52 commentsid oofiqx18 Jul 2026

52 comments

30 in this archive, depth 5

best — the order this archive was captured in

u/sofia_nascimento174 points·10 days ago

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.

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[removed]129 points·10 days ago

[removed by moderator]

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u/hugo_bergstrom37 points·10 days 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/ferran_mensahOP26 points·10 days ago

2.5mg is a four-week starting dose, not a maintenance dose. Worth being precise since people search these threads.

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u/gustav_vermeulen8 points·9 days ago

Sulphur burps for the first eight days after each step, then nothing. Predictable enough that I planned my week around it.

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u/ferran_mensahOP9 points·10 days ago

Have you held a step for longer than the four-week minimum at any point?

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u/thyroid_tangent132 points·10 days ago

The 21% figure is a 72-week mean on the highest arm. Quoting it as what someone should expect by week 49 is not a fair reading.

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u/dexa_twice_yearlyMOD63 points·10 days ago

Trial identifiers corrected in the title. SURMOUNT and SURPASS are different programmes.

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u/mod_cold_roommod · c/coldchain77 points·10 days ago·edited

Yes — 10mg being a genuine landing place for a lot of people is underrated. There is no medal for 15.

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u/ferran_mensahOP53 points·10 days ago

Correction to my own post above — I said 10mg and I have been on 12.5mg since the spring. Same argument, wrong number.

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u/zeynep_ndiaye75 points·11 days ago

Which week did the appetite change actually land for you?

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u/ingrid_correia-4 points·11 days ago

Does injection-site soreness follow the day after the shot, or is it spread across the week?

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u/adnan_nascimento26 points·11 days ago

zepbound and mounjaro are the same compound with different labels

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u/b12_baseline53 points·11 days ago

The step schedule question, answered properly, because it comes up weekly.

The label sets a minimum interval of four weeks between increases. That is a floor on how fast you may go, and it exists because tolerability, not efficacy, is what limits most people. There is nothing in the pharmacology that says you must increase at four weeks, or at eight, or ever.

What decides it in practice is whether the effect you want is still there. If appetite is quiet and the trend is going the right way, the dose is doing its job. If both have genuinely gone flat for six weeks or more, that is a conversation worth having with someone who knows your history.

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u/slow_logbook_ftw21 points·10 days ago

Push back: "gentler than sema" is a population statement. Plenty of people on this board have the opposite experience and they are not doing it wrong.

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u/dexa_twice_yearlybody comp5 points·10 days 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/titration_marshalmod · c/semaglutide53 points·10 days ago

hold the dose that works, the ladder is not a leaderboard

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u/sten_palacios39 points·10 days ago

Appetite effect for me is flat across seven days. On sema it was a wave. Same person, different molecule.

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u/hub_opssite staff33 points·9 days ago

17kg over 92 weeks, never went past 10mg, and food noise stayed mild the whole way. Posting because the loud threads are all 15mg.

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u/throwaway_titration23 points·10 days ago

Agreed, and the trial number is a mean of a very wide distribution — the tails are enormous and nobody posts from the middle.

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u/two_mil_or_one10 points·9 days ago

Agreed, and the trial number is a mean of a very wide distribution — the tails are enormous and nobody posts from the middle.

This. The step interval is a floor, and reading it as a timetable is the most expensive mistake in the thread.

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u/taper_off_tabitha4 points·9 days ago

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

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u/kaia_wojcik30 points·10 days ago

Disagree with the conversion table. There is no validated equivalence between the two molecules and posting one as though there is does real damage.

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u/ewan_marchand7 points·10 days ago

2.5 is the starter dose and it is not meant to be the dose that works

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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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