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c/tirzepatide·posted 9 months ago by u/elin_varga

SURMOUNT vs SURPASS — genuinely asking which matters more

Trial Data Receipts ×1 Slow Clap ×2 Well Actually ×3

Long-ish post, sorry. tl;dr at the bottom.

I have been tracking SURMOUNT against eGFR for 19 weeks because I could not find anyone who had. The correlation is weaker than I expected, which is itself mildly interesting given how confidently people link the two in here.

Caveats up front: one person, one lab, one assay, no control, and I changed my training in the middle of it, which was stupid.

tl;dr: probably real, definitely smaller than the threads imply, and not worth reorganising your week around.

23,714 up / 20,620 down53% upvoted43 commentsid nkz32o30 Oct 2025

43 comments

14 in this archive, depth 6

best — the order this archive was captured in

u/mikkel_kimani603 points·9 months ago

Crossposting this to c/intlshipping because the people who need it are not reading this community.

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[deleted]240 points·9 months ago

[deleted]

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u/elin_vargaOP338 points·9 months ago

the dual agonism hits different and that is why people describe it differently

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u/forest_plot_fionastats-18 points·9 months ago

the injection-site soreness from tirz is different, not necessarily worse

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u/cato_girard330 points·9 months ago

the 15mg is the top of the pen, not the required dose

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u/britt_okwuosa218 points·9 months ago·edited

dual agonism is Mounjaro, do not generalise from semaglutide

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u/piotr_nascimento123 points·9 months ago

stalled on sema, tried tirz, and the curves were actually different shapes

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u/slow_logbook_ftw101 points·9 months ago·edited

What was the trial arm you are quoting from? SURMOUNT-1, -2, -3 are all different.

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u/teodor_szabo74 points·9 months ago

stalled on sema, tried tirz, and the curves were actually different shapes

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u/emil_okwuosa49 points·9 months ago

nope, the equivalence to semaglutide is not known, comparing 15mg tirz to 2.4mg sema is guessing

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u/spain_receta37 points·9 months ago

Respectfully this is a sample of one presented as a finding.

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u/elin_vargaOP16 points·9 months ago

the fatigue from tirz is different, not necessarily worse

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u/elin_vargaOP72 points·9 months ago

the 15mg is the top of the pen, not the required dose

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u/rania_marchand103 points·9 months ago·edited

Yeah, dual agonism does produce a different appetite profile than GLP-1 alone.

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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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