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c/tirzepatide·posted 2 years ago by u/copay_card_cc

my fasting insulin moved and I cannot work out whether Zepbound is why

Results Sourced ×4 Slow Clap ×3 Receipts ×2

Posting this as a discussion rather than a claim: my fasting insulin moved and I cannot work out whether Zepbound is why.

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.

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.

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.

Would rather be corrected in public than confident in private.

8,509 up / 1,794 down83% upvoted38 commentsid 15ec3s14 Jun 2024

38 comments

30 in this archive, depth 3

best — the order this archive was captured in

u/gentle_correctionnice about it1.1k points·2 years 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/copay_card_ccOP1.6k points·2 years ago

That percentage is body weight change, not body fat. Different measurement, and the distinction gets lost every time.

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u/ferritin_low837 points·2 years ago

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

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u/coring_the_stopper870 points·2 years ago

zepbound and mounjaro are the same compound with different labels

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u/dario_stanescu1k points·2 years 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/slow_logbook_ftw345 points·2 years 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/cormac_pereira145 points·2 years ago

2.5mg is a four-week starting dose, not a maintenance dose.

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

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u/incretin_ivypharmacology528 points·2 years ago

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.

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u/tove_vasquez359 points·2 years ago

Does fatigue follow the day after the shot, or is it spread across the week?

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u/signe_villalobos0 points·2 years ago

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

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u/ahmed_fonseca0 points·2 years 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/amara_halonen1 point·2 years ago

Pen or vial? The step sizes available differ and it changes this answer.

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u/signe_villalobos1 point·2 years ago

week 9 is early to draw any conclusion at all

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u/copay_card_ccOP763 points·2 years ago

Correction to my own post above — I said 12.5mg and I have been on 5mg since the spring. Same argument, wrong number.

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u/coring_the_stopper487 points·2 years 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/halima_boateng288 points·2 years 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/tidy_vialdrawer_pls414 points·2 years 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/swirl_dont_shakereconstitution327 points·2 years ago

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

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u/spain_receta224 points·2 years ago

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 here. It is a mean, and the distribution around it is very wide. It is 72 weeks, which is a year and a half. And it is a trial population with trial support, which is not the same as a person with a spreadsheet.

Use it as a rough shape, not a benchmark. A 12% year is inside the ordinary range and people quit over it every week on this board.

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u/nabila_ogunleye69 points·2 years 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/hair_shed_hannah20 points·2 years ago

Sulphur burps for the first eight days after each step, then nothing.

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

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u/ferritin_low32 points·2 years ago

dual agonist, so the GIP arm is doing something the sema threads will not tell you about

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u/titration_marshalMOD151 points·2 years ago

Left up, flair changed to Discussion. It is an opinion post and that is fine as long as it is labelled.

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[deleted]106 points·2 years ago

[deleted]

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u/britt_okwuosa69 points·2 years ago

the trials titrated on a calendar, real people titrate on symptoms

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u/nabila_ogunleye88 points·2 years ago

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

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u/zeynep_ndiaye44 points·2 years ago

SURMOUNT-1 landed around 21% at 72 weeks on the top arm

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u/sten_bhattacharya-22 points·2 years ago

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

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u/dario_stanescu1 point·2 years ago

sulphur burps are the signature complaint and they are not dangerous

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u/swirl_dont_shakereconstitution65 points·2 years ago

switching from sema is not a dose conversion, there is no clean equivalence

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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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