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c/tirzepatide·posted 8 months ago by u/aurel_lindqvist

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

Discussion

we are measuring SURPASS at the wrong time and calling it noise — 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.

If somebody has the same thing measured a different way, post it next to mine and we will see whether they agree.

87 up / 133 down40% upvoted13 commentsid oexw5l7 Nov 2025

13 comments

13 in this archive, depth 4

best — the order this archive was captured in

u/forest_plot_fionastats10 points·8 months 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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[removed]7 points·8 months ago

[removed by moderator]

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u/matias_salgado3 points·8 months ago

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

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/mikkel_kimani-5 points·8 months ago

sulphur burps are the signature complaint and they are not dangerous

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u/ewan_marchand-6 points·8 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/kaia_wojcik1 point·8 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/sten_palacios1 point·8 months ago

Did you come to this from sema, and if so how long was the gap?

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u/laila_yilmaz1 point·8 months ago

the appetite effect is blunter than sema, in a good way, most weeks

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u/amara_halonen7 points·8 months ago

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

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u/aurel_lindqvistOP4 points·8 months ago

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

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u/priya_guerrero6 points·8 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/aurel_lindqvistOP5 points·8 months ago

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

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u/aurel_lindqvistOP4 points·8 months ago

Correction to my own post above — I said 15mg and I have been on 2.5mg since the spring. Same argument, wrong number.

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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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