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

unpopular opinion: most of what gets said here about GIP is guesswork

Trial Data Slow Clap ×5 Sourced ×1

unpopular opinion: most of what gets said here about GIP is guesswork. Making the case below, and I expect to lose some of it in the comments.

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.

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.

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.

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

2,390 up / 929 down72% upvoted50 commentsid 14ka587 Feb 2024

50 comments

22 in this archive, depth 4

best — the order this archive was captured in

u/nordic_pricing252 points·2 years ago

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.

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u/tidy_vialdrawer_pls207 points·2 years ago

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

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u/dexa_twice_yearlyMOD144 points·2 years ago

Removed the conversion table. There is no published equivalence between the two molecules and posting one as fact is exactly the kind of thing that gets copied for years.

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u/sanne_novak91 points·2 years ago

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

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u/aksel_kjaer48 points·2 years ago

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

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u/crosspost_bot_no24 points·2 years ago

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

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u/rania_dialloOP48 points·2 years ago

What step are you on and how long have you been there?

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u/quiet_moderatormod70 points·2 years ago

What step are you on and how long have you been there?

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

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u/thyroid_tangent39 points·2 years 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/curious_panel_only32 points·2 years ago

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

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u/rania_dialloOP24 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/customs_seizure_sid7 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/ferran_mensah64 points·2 years ago

the constipation profile is genuinely gentler than people expect coming from sema

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[removed]29 points·2 years ago

[removed by moderator]

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u/vito_chowdhury46 points·2 years ago

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

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u/emil_barros17 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/sten_bhattacharya12 points·2 years ago·edited

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/search_before_post14 points·2 years ago

Yes. I stepped to 12.5 because the calendar said so, not because anything needed fixing, and I regretted it for a fortnight.

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u/line_petrov3 points·2 years 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/blunt_coldbox291 point·2 years 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/santiago_villalobos1 point·2 years ago

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

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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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