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Compounds · Semaglutide

Coming back to: What the published dose-response for semaglutide actually looks like above 2.4 mg

Solved
Solved by an.zamora in post #7
Worth separating two things that post #3 runs together. The C-cell question: semaglutide triggered medullary thyroid carcinoma in rodent toxicology studies. A signal in rodents does not automatically appear in humans, but it is the reason the compound is contraindicated in people with personal or family history of…

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SC
s.cardosoTL2 Moderator17 Nov 2025#1

The question in the title: What the published dose-response for semaglutide actually looks like above 2.4 mg I will give what I have already checked below so nobody repeats it.

I have seen LEADER (N Engl J Med, 2016) cited in support of a claim I do not think it supports, twice this month, so I would like to work through what it actually shows.

My reading is that the trial is sound for its own question and is being stretched to answer a different one. I might be wrong about that, which is why this is a topic rather than a correction.

What I would like from this discussion: someone who disagrees with me to say why, with the section of the paper they are relying on.

59 likes 8mo
H
HadjipaterasTL1Member4 Dec 2025#2

Picking up the opening post: that is the part I would want checked first.

The STEP programme populations were selected: enrollment criteria required baseline body mass index over 30, no recent blood pressure crisis, no recent retinopathy, no renal disease at the time. Applying results from that population to someone well outside it is an extrapolation and should be called one.

16 likes 8mo
JS
j.sandvikTL2 Moderator16 Dec 2025#3

The mass figure differs between sources because of how the different entities report it. The monoisotopic mass of the bare peptide is one number; the mass including the acylation is another. Different sources emphasise different details.

6 likes 7mo
AT
a.thorneTL2Wiki editor27 Dec 2025#4
Hadjipateras, post #2: Picking up the opening post: that is the part I would want checked first. The STEP programme populations were selected: enrollment criteria required baseline body mass index over 30, no recent blood pressure crisis, no recent retinopathy, no renal disease at the time. Applying results from that population to someone well outside it is… Go to post

Albumin binding is not a unique structural feature and nothing in the class lacks it, but the reversibility matters. Semaglutide binds albumin covalently through a fatty side chain, which creates a very long half-life at the cost of sequestering the free form. That is a trade-off and it is the trade-off that allows weekly dosing.

1 like in reply to #2 7mo
KO
k.ogunleyeTL2 Moderator6 Jan 2026#5
Hadjipateras, post #2: Picking up the opening post: that is the part I would want checked first. The STEP programme populations were selected: enrollment criteria required baseline body mass index over 30, no recent blood pressure crisis, no recent retinopathy, no renal disease at the time. Applying results from that population to someone well outside it is… Go to post

Two things before anyone answers the substance.

First, the context in the first post is clear and specific. Second, the question is framed so that an answer can actually address it. Both are the norm here and both matter more than they sound.

24 likes in reply to #2 7mo
S
SHermansenTL2Member15 Jan 2026#6

This follows post #3 rather than contradicting it.

Is there a ceiling dose beyond which the effect plateaus? The trials did not study that because they stopped at 2.4 mg. Some people report trying higher doses, but trial data is absent and off-label dosing enters territory this site does not advise on.

11 likes 6mo
AZ
an.zamoraTL2 Moderator Solution24 Jan 2026#7

Worth separating two things that post #3 runs together.

The C-cell question: semaglutide triggered medullary thyroid carcinoma in rodent toxicology studies. A signal in rodents does not automatically appear in humans, but it is the reason the compound is contraindicated in people with personal or family history of medullary thyroid carcinoma or multiple endocrine neoplasia type 2.

10 likes 6mo
R
RodriguesTL3Regular2 Feb 2026#8

Approved indications differ by jurisdiction and change. As of mid-2026 the weight-management indication is approved in many European jurisdictions but not all, and access is still narrower in others. For your own region, check the regulatory website rather than a forum summary.

0 likes 6mo
CC
c.chowdhuryTL2 Moderator11 Feb 2026#9

The 165 to 184 hour range: that is roughly 7 to 7.6 days, which is why the weekly schedule works. Below 4 half-lives you are not approaching steady state yet, which is the pharmacological argument for the four-week step interval.

0 likes 5mo
B
batchlogTL3Regular19 Feb 2026#10

Gastric emptying delay is the mechanism behind most of the gastrointestinal side effects. Slowing the stomach empties it feeds less food into the intestines at a time, which is part of the satiety mechanism but is also why nausea is dose-dependent and titration-dependent.

31 likes 5mo
AD
appeals_deskTL3Regular27 Feb 2026#11

The SELECT trial changed the positioning because it was the first cardiovascular outcome trial in people without diabetes. That decoupled the cardiovascular argument from glycaemic control, which is why it mattered beyond its own numbers.

6 likes 5mo
AK
a.kirchnerTL2 Moderator7 Mar 2026 · edited#12
an.zamora, post #7: Worth separating two things that post #3 runs together. The C-cell question: semaglutide triggered medullary thyroid carcinoma in rodent toxicology studies. A signal in rodents does not automatically appear in humans, but it is the reason the compound is contraindicated in people with personal or family history of medullary thyroid… Go to post

Coming back to post #10, because the follow-up matters more than the original answer.

Semaglutide versus liraglutide in STEP 8: semaglutide produced greater weight reduction and the discontinuation rates differed. But the trial was open-label for the dosing schedule, which admits expectation effects. Weekly versus daily itself is part of the comparison, not a confounding variable to be removed.

17 likes in reply to #7 5mo
P
preregisteredTL3Research methods14 Mar 2026#13

post #12 answers the question as asked. The question underneath it is different.

For anyone arriving from a search: the marked solution above is the direct answer, and the replies underneath it add the caveats that make it safe to use.

32 likes 4mo
YR
y.rahimiTL2 Moderator22 Mar 2026#14

The opalescent appearance in semaglutide solutions is occasionally noted and the mechanism is unclear. It does not appear to correlate with product failure in practice. Visible particles or frank cloudiness is different and would be reason to contact the supplier.

0 likes 4mo
RI
retention_indexTL229 Mar 2026#15
RP
r.petrovTL2 Moderator6 Apr 2026#16

I read post #14 twice before replying, because I had assumed the opposite.

The C-cell question: semaglutide triggered medullary thyroid carcinoma in rodent toxicology studies. A signal in rodents does not automatically appear in humans, but it is the reason the compound is contraindicated in people with personal or family history of medullary thyroid carcinoma or multiple endocrine neoplasia type 2.

11 likes 4mo
C
chromatogramTL4Analytical chemist13 Apr 2026#17
Hadjipateras, post #2: Picking up the opening post: that is the part I would want checked first. The STEP programme populations were selected: enrollment criteria required baseline body mass index over 30, no recent blood pressure crisis, no recent retinopathy, no renal disease at the time. Applying results from that population to someone well outside it is… Go to post

Is there a ceiling dose beyond which the effect plateaus? The trials did not study that because they stopped at 2.4 mg. Some people report trying higher doses, but trial data is absent and off-label dosing enters territory this site does not advise on.

24 likes in reply to #2 3mo
MA
m.adeyemiTL2 Moderator20 Apr 2026#18

Two things before anyone answers the substance.

First, the context in the first post is clear and specific. Second, the question is framed so that an answer can actually address it. Both are the norm here and both matter more than they sound.

0 likes 3mo
JM
j.mwangiTL4 Moderator27 Apr 2026#19
Staff post. Actions described here are recorded in the public moderation log and may be challenged in Meta.

Approved indications differ by jurisdiction and change. As of mid-2026 the weight-management indication is approved in many European jurisdictions but not all, and access is still narrower in others. For your own region, check the regulatory website rather than a forum summary.

1 like 3mo
EK
e.kuuselaTL2 Moderator4 May 2026#20

The 165 to 184 hour range: that is roughly 7 to 7.6 days, which is why the weekly schedule works. Below 4 half-lives you are not approaching steady state yet, which is the pharmacological argument for the four-week step interval.

7 likes 3mo
HF
h.ferrariTL2 Moderator11 May 2026 · edited#21
a.thorne, post #4: Albumin binding is not a unique structural feature and nothing in the class lacks it, but the reversibility matters. Semaglutide binds albumin covalently through a fatty side chain, which creates a very long half-life at the cost of sequestering the free form. That is a trade-off and it is the trade-off that allows weekly dosing. Go to post

Coming back to post #19, because the follow-up matters more than the original answer.

Two things before anyone answers the substance.

First, the context in the first post is clear and specific. Second, the question is framed so that an answer can actually address it. Both are the norm here and both matter more than they sound.

5 likes in reply to #4 3mo
RF
r.friskTL2 Moderator18 May 2026#22

The SELECT trial changed the positioning because it was the first cardiovascular outcome trial in people without diabetes. That decoupled the cardiovascular argument from glycaemic control, which is why it mattered beyond its own numbers.

1 like 2mo
KC
k.chukwuTL2 Moderator24 May 2026#23

On alcohol: the labelling does not contraindicate it, but it raises gastric irritation risk and semaglutide already does that. There is no published interaction study and the conservative position is to limit it if you are titrating or if gastrointestinal symptoms are troublesome.

30 likes 2mo
FF
f.fenwickTL331 May 2026#24
FV
f.villalobosTL2 Moderator7 Jun 2026#25
an.zamora, post #7: Worth separating two things that post #3 runs together. The C-cell question: semaglutide triggered medullary thyroid carcinoma in rodent toxicology studies. A signal in rodents does not automatically appear in humans, but it is the reason the compound is contraindicated in people with personal or family history of medullary thyroid… Go to post

Albumin binding is not a unique structural feature and nothing in the class lacks it, but the reversibility matters. Semaglutide binds albumin covalently through a fatty side chain, which creates a very long half-life at the cost of sequestering the free form. That is a trade-off and it is the trade-off that allows weekly dosing.

9 likes in reply to #7 2mo
TP
t.pereiraTL2 Moderator13 Jun 2026#26
Hadjipateras, post #2: Picking up the opening post: that is the part I would want checked first. The STEP programme populations were selected: enrollment criteria required baseline body mass index over 30, no recent blood pressure crisis, no recent retinopathy, no renal disease at the time. Applying results from that population to someone well outside it is… Go to post

For anyone arriving from a search: the marked solution above is the direct answer, and the replies underneath it add the caveats that make it safe to use.

2 likes in reply to #2 1mo
BA
b.aaltoTL2 Moderator20 Jun 2026#27

Worth separating two things that post #23 runs together.

The mass figure differs between sources because of how the different entities report it. The monoisotopic mass of the bare peptide is one number; the mass including the acylation is another. Different sources emphasise different details.

0 likes 1mo
EL
e.lehtinenTL2 Moderator26 Jun 2026#28

post #27 is right about the mechanism and I think understates the practical bit.

The STEP programme populations were selected: enrollment criteria required baseline body mass index over 30, no recent blood pressure crisis, no recent retinopathy, no renal disease at the time. Applying results from that population to someone well outside it is an extrapolation and should be called one.

21 likes 1mo

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