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c/tirzepatide·submitted 1 year ago by u/ignacio_vanhecke

[Discussion] we are measuring Mounjaro at the wrong time and calling it noise

Discussionbranch of 15 comments

we are measuring Mounjaro at the wrong time and calling it noise — a position I have arrived at slowly and would like tested. On comparing yourself with the trial number. SURMOUNT-1 reported roughly 21% mean body weight change at 72 weeks on the highest arm. Three things get dropped every time that figure is quoted…

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15 comments, started 1 year ago
u/britt_okwuosa788 points·1 year ago

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.

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u/mod_cold_roommod · c/coldchain1.2k points·1 year ago

Switching from semaglutide, since three people asked in this thread alone.

There is no published dose equivalence between the two. The conversion tables that circulate are somebody’s arithmetic, not data. What people report here is that the first month after a switch is often flat, that the appetite effect feels differently shaped rather than simply stronger, and that starting at the bottom of the ladder again is the common approach.

None of that is a recommendation. It is what the threads say, and the threads are not a clinic.

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u/blunt_coldbox29590 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/dexa_twice_yearlybody comp0 points·1 year ago·edited

The 21% figure is a 72-week mean on the highest arm. Quoting it as what someone should expect by week 51 is not a fair reading.

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u/incretin_ivypharmacology1 point·1 year ago

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

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u/copay_card_cc1 point·1 year ago·edited

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

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/marit_sandvik1 point·1 year ago·edited

This.

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

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u/dario_vermeulen1 point·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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u/nz_unfunded1 point·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/taper_off_tabitha1 point·1 year ago

Correction to my own post above — I said 7.5mg and I have been on 5mg since the spring. Same argument, wrong number.

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u/teodor_szabo1 point·1 year ago

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

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u/ignacio_vanheckeOP622 points·1 year ago

34kg over 83 weeks, never went past 10mg, and injection-site soreness stayed mild the whole way. Posting because the loud threads are all 15mg.

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u/ignacio_vanheckeOP457 points·1 year ago

the four-week step schedule is the label, not folklore

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u/priya_guerrero253 points·1 year ago

Small fix: SURMOUNT is the obesity programme, SURPASS is the type-2 programme. They are different endpoints and the numbers do not transfer.

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u/throwaway_titration242 points·1 year ago·edited

the four-week step schedule is the label, not folklore

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

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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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