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c/tirzepatide·posted 1 year ago by u/ahmed_fonseca

how much of what we believe about Mounjaro actually comes from SURMOUNT threads

Side Effects Clean Column ×8 Slow Clap ×1

Slightly embarrassed to be asking this, but: how much of what we believe about Mounjaro actually comes from SURMOUNT threads.

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.

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.

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.

Happy to answer the boring questions. Those are usually the ones worth asking.

1,363 up / 332 down80% upvoted46 commentsid p8zuqh25 Jun 2025

46 comments

30 in this archive, depth 6

best — the order this archive was captured in

u/rania_marchand197 points·1 year ago

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.

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u/britt_okwuosa161 points·1 year ago

The distribution matters more than the mean.

Agreed, with one qualifier: that is the mean of the top arm and the spread around it was enormous.

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u/piotr_nascimento152 points·1 year ago

Not sure that follows. You went up a step and changed your training in the same fortnight.

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u/ahmed_fonsecaOP110 points·1 year ago

Not sure that follows.

piotr_nascimento is right that the two molecules are not interchangeable. There is no published conversion and the ones circulating are invented.

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u/cormac_pereira59 points·1 year 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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[removed]78 points·1 year ago

[removed by moderator]

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u/titration_marshalMOD95 points·1 year ago

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

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u/ahmed_fonsecaOP68 points·1 year ago

Trial identifiers corrected in the title.

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

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u/titration_marshalmod · c/semaglutide56 points·1 year ago

a lot of people plateau nicely at 10mg and never need 15

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u/rania_marchand24 points·1 year ago

Agree. The GIP component is the interesting half and it barely gets discussed outside c/glp1science.

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u/piotr_nascimento30 points·1 year 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/slow_logbook_ftw15 points·1 year ago

Right. And the sema-to-tirz "conversion" people post is invented. There is no published equivalence.

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u/two_mil_or_one52 points·1 year 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/emil_barros51 points·1 year 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/aurel_lindqvist32 points·1 year ago

if 7.5 is working, 10 is not automatically better

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u/alcohol_aversion18 points·1 year ago

Cosigning the four-week thing. It is a minimum interval, and treating it as a schedule to keep up with is how people end up miserable at 12.5.

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u/cormac_pereira41 points·1 year ago

The 21% figure is a 72-week mean on the highest arm. Quoting it as what someone should expect by week 29 is not a fair reading.

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u/graph_it_gary0 points·1 year ago

sulphur burps are the signature complaint and they are not dangerous

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u/zeynep_zielinski1 point·1 year ago

What is the waist doing? That is usually the number still moving during a scale stall.

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u/ahmed_fonseca47 points·1 year ago

Came off sema and onto tirz with a two-week gap. The first month was flat and I assumed I had made a mistake. Month two it moved.

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u/kofi_balogun26 points·1 year ago

I would separate the two claims. That the GIP arm exists is uncontroversial; that it explains your fatigue pattern is a guess.

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u/taper_off_tabitha9 points·1 year ago

pens and vials are the same molecule, the price is the difference

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u/tarek_lokken7 points·1 year ago

Careful with "everyone tolerates it better". The people it did not suit stop posting, which makes this board look calmer than the drug is.

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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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