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c/tirzepatide·posted 4 months ago by u/rania_marchand

[PSA] Zepbound is not what most of this community thinks it is

Discussion Long Haul ×6 Sourced ×1

Putting this at the top of the board where it belongs: Zepbound is not what most of this community thinks it is.

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.

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.

Sulphur burps for the first eight days after each step, then nothing. Predictable enough that I planned my week around it.

Sceptical readings welcome. The confident ones are the ones I distrust.

2,934 up / 389 down88% upvoted63 commentsid 1tr25w20 Mar 2026

63 comments

30 in this archive, depth 5

best — the order this archive was captured in

u/laila_wikstrom464 points·4 months ago·edited

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/rania_marchandOP337 points·4 months ago

Appetite effect for me is flat across seven days. On sema it was a wave. Same person, different molecule.

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u/slow_logbook_ftw266 points·4 months ago

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

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u/titration_marshalmod · c/semaglutide279 points·4 months 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/rania_marchandOP209 points·4 months ago

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

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u/gustav_vermeulen273 points·4 months 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/rania_marchand0 points·4 months ago

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

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u/blunt_coldbox291 point·4 months 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/aksel_kjaer1 point·4 months ago

30kg over 69 weeks, never went past 10mg, and fatigue stayed mild the whole way. Posting because the loud threads are all 15mg.

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u/elin_varga2 points·4 months 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/ahmed_fonseca1 point·4 months ago

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

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u/copay_card_cc1 point·4 months ago

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

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u/piotr_nascimento120 points·4 months ago·edited

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/dexa_twice_yearlyMOD177 points·4 months 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/ferran_mensah224 points·4 months ago

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

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u/signe_villalobos83 points·4 months 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/rania_marchandOP46 points·4 months ago

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

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u/two_mil_or_one21 points·4 months ago

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

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u/mikkel_ogunleye30 points·4 months 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/zaid_balogun135 points·4 months 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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[deleted]97 points·4 months ago

[deleted]

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u/ferritin_low33 points·4 months ago

Went 10 to 12.5 on the calendar and had the worst fortnight of the whole run. Dropped back to 10 and everything settled.

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u/hair_shed_hannah40 points·4 months 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/samir_falk47 points·4 months ago

sulphur burps are the signature complaint and they are not dangerous

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u/swirl_dont_shakereconstitution35 points·4 months ago

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

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u/santiago_villalobos84 points·4 months ago

Week 27 was the first time the scale moved after a five-week stall. I changed nothing in that window.

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u/kaia_wojcik51 points·4 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/swirl_dont_shakereconstitution97 points·4 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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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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