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Compounds · Oral incretins · continued

Oral semaglutide bioavailability and its variability between people — a second dataset posts 121–150

This is a continuation of a long topic, addressed by post number rather than by page. Start at post 1.

SO
s.okonkwoTL228 Dec 2024#121
CD
cohort_driftTL3Regular28 Dec 2024 · edited#122

Oral versus injectable exposure: comparing a 14 mg oral dose with a 0.5 mg injectable dose is comparing apples to a different fruit. The oral bioavailability is low enough that dose numbers are an order of magnitude different and not directly comparable.

0 likes 19mo
RC
r.chukwuTL2 Moderator28 Dec 2024#123
hana.sato, post #44: PIONEER 6 was a cardiovascular safety trial for oral semaglutide, not an efficacy trial. Non-inferiority for safety was demonstrated. The point estimates favoured the drug but the trial was not designed to establish benefit. Go to post

The SOUL trial: cardiovascular outcomes trial for oral semaglutide in people with type 2 diabetes and cardiovascular disease or chronic kidney disease. It demonstrates that benefit appears to be a property of the molecule and exposure, not specific to the route.

1 like in reply to #44 19mo
B
BramleyTL2Member28 Dec 2024#124
j.petrov, post #72: Practical note that does not fit anywhere else. Whatever you conclude from this topic, write down what you did and when. The single most useful thing in your own records is not any individual result; it is that they are dated and consecutive. Go to post

Dose numbers for oral formulations are not comparable to injectable ones. The 14 mg oral dose is not equivalent to any injectable dose in the traditional comparison sense. They are different formulations with different pharmacokinetics and cannot be put on the same scale.

5 likes in reply to #72 19mo
ND
n.dziedzicTL2 Moderator28 Dec 2024#125

post #124 is right about the mechanism and I think understates the practical bit.

PIONEER programme is phase 3 for oral semaglutide. The trials cover multiple indications and durations. Reading them requires attention to which trial is which because they are not all the same question.

29 likes 19mo
CN
c.niemelTL3Regular29 Dec 2024#126

Worth separating two things that post #122 runs together.

Trial adherence in an oral trial with strict administration requirements is genuinely worse than trial-published data often suggests. That is why the exposure variability in oral formulations is mentioned repeatedly in the discussions here.

0 likes 19mo
NN
n.nakamuraTL2 Moderator29 Dec 2024#127
m.oyelaran, post #32: On post #28 — agreed on the reasoning, with one qualification. Fasting instructions are not optional advice. Taking the tablet with food or with more than a sip of water measurably reduces absorption. This is the one compound in the class where the instructions genuinely determine the exposure. Go to post

SNAC is the sodium N-(8-[2-hydroxybenzoyl]amino) caprylate, an absorption enhancer that transiently raises local pH in the stomach and promotes gastric mucosal absorption. Without it, oral bioavailability of semaglutide would be too low for clinically useful dosing.

2 likes in reply to #32 19mo
OC
o.cousineauTL3Regular29 Dec 2024#128

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.

9 likes 19mo
NV
n.vogelTL2 Moderator29 Dec 2024#129

Why an oral formulation is a formulation achievement: the molecule is the same but the tablet is novel. Getting a peptide across the gastric epithelium at usable bioavailability is a chemistry problem, not a dose problem.

0 likes 19mo
EO
e.okaforTL229 Dec 2024#130
BN
bench_notesTL4 Moderator29 Dec 2024#131
Staff post. Actions described here are recorded in the public moderation log and may be challenged in Meta.

I read post #129 twice before replying, because I had assumed the opposite.

PIONEER 6 was a cardiovascular safety trial for oral semaglutide, not an efficacy trial. Non-inferiority for safety was demonstrated. The point estimates favoured the drug but the trial was not designed to establish benefit.

2 likes 19mo
KP
k.perrinTL2 Moderator29 Dec 2024#132
a.asante, post #60: Coming back to post #58, because the follow-up matters more than the original answer. Oral versus injectable exposure: comparing a 14 mg oral dose with a 0.5 mg injectable dose is comparing apples to a different fruit. The oral bioavailability is low enough that dose numbers are an order of magnitude different and not directly comparable. Go to post

Oral bioavailability is variable between people. Some people absorb well; others absorb poorly. That inter-individual variation is larger than with injectables and is one reason the trial data for oral formulations receives different treatment.

0 likes in reply to #60 19mo
KV
k.vanheckeTL2 Moderator29 Dec 2024#133
t.kulkarni, post #17: post #16 answers the question as asked. The question underneath it is different. The SOUL trial: cardiovascular outcomes trial for oral semaglutide in people with type 2 diabetes and cardiovascular disease or chronic kidney disease. It demonstrates that benefit appears to be a property of the molecule and exposure, not specific to the… 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.

0 likes in reply to #17 19mo
KF
k.fonsecaTL2 Moderator29 Dec 2024 · edited#134

Fasting instructions are not optional advice. Taking the tablet with food or with more than a sip of water measurably reduces absorption. This is the one compound in the class where the instructions genuinely determine the exposure.

0 likes 19mo
NA
n.abernathyTL3Analytical chemist29 Dec 2024#135

SNAC is the sodium N-(8-[2-hydroxybenzoyl]amino) caprylate, an absorption enhancer that transiently raises local pH in the stomach and promotes gastric mucosal absorption. Without it, oral bioavailability of semaglutide would be too low for clinically useful dosing.

20 likes 19mo
SM
s.mbekiTL2 Moderator29 Dec 2024#136

Trial adherence in an oral trial with strict administration requirements is genuinely worse than trial-published data often suggests. That is why the exposure variability in oral formulations is mentioned repeatedly in the discussions here.

8 likes 19mo
RA
r.aldana_pharmdTL4Pharmacist29 Dec 2024#137
m.oyelaran, post #32: On post #28 — agreed on the reasoning, with one qualification. Fasting instructions are not optional advice. Taking the tablet with food or with more than a sip of water measurably reduces absorption. This is the one compound in the class where the instructions genuinely determine the exposure. Go to post

PIONEER programme is phase 3 for oral semaglutide. The trials cover multiple indications and durations. Reading them requires attention to which trial is which because they are not all the same question.

2 likes in reply to #32 19mo
AV
a.vukovicTL2 Moderator29 Dec 2024#138

post #137 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.

0 likes 19mo
EF
e.ferreiraTL3Regular29 Dec 2024#139

Practical note that does not fit anywhere else. Whatever you conclude from this topic, write down what you did and when. The single most useful thing in your own records is not any individual result; it is that they are dated and consecutive.

27 likes 19mo
BK
b.kowalskiTL2 Moderator29 Dec 2024#140

This follows post #137 rather than contradicting it.

Oral bioavailability is variable between people. Some people absorb well; others absorb poorly. That inter-individual variation is larger than with injectables and is one reason the trial data for oral formulations receives different treatment.

13 likes 19mo
PF
p.friskTL229 Dec 2024#141
ID
integrator_draftTL3Regular29 Dec 2024#142

Fasting instructions are not optional advice. Taking the tablet with food or with more than a sip of water measurably reduces absorption. This is the one compound in the class where the instructions genuinely determine the exposure.

0 likes 19mo
FP
f.petrovTL2 Moderator29 Dec 2024#143
b.okonkwo, post #42: post #41 answers the question as asked. The question underneath it is different. Why administration conditions matter for oral semaglutide and not for injectables: the oral formulation depends on a transient pH effect in the stomach. Anything that changes gastric pH or transit time changes absorption. Food does both. Go to post

Why an oral formulation is a formulation achievement: the molecule is the same but the tablet is novel. Getting a peptide across the gastric epithelium at usable bioavailability is a chemistry problem, not a dose problem.

2 likes in reply to #42 19mo
VM
v.milanoviTL3Regular29 Dec 2024#144
i.norgaard, post #74: I read post #72 twice before replying, because I had assumed the opposite. SNAC is the sodium N-(8-[2-hydroxybenzoyl]amino) caprylate, an absorption enhancer that transiently raises local pH in the stomach and promotes gastric mucosal absorption. Without it, oral bioavailability of semaglutide would be too low for clinically useful… Go to post

On post #140 — agreed on the reasoning, with one qualification.

PIONEER 6 was a cardiovascular safety trial for oral semaglutide, not an efficacy trial. Non-inferiority for safety was demonstrated. The point estimates favoured the drug but the trial was not designed to establish benefit.

8 likes in reply to #74 19mo
SS
s.solbergTL2 Moderator29 Dec 2024#145

Orforglipron is a small molecule, not a peptide. That changes almost everything: no absorption enhancer required, no fasting window, chemical synthesis instead of peptide synthesis, different analytical methods entirely. Data from peptide agonists does not transfer.

13 likes 19mo
HK
h.koodziejTL2Member29 Dec 2024#146

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.

27 likes 19mo
HF
h.fonsecaTL2 Moderator29 Dec 2024#147
k.karlsen, post #58: Dose numbers for oral formulations are not comparable to injectable ones. The 14 mg oral dose is not equivalent to any injectable dose in the traditional comparison sense. They are different formulations with different pharmacokinetics and cannot be put on the same scale. Go to post

post #146 is right about the mechanism and I think understates the practical bit.

Why administration conditions matter for oral semaglutide and not for injectables: the oral formulation depends on a transient pH effect in the stomach. Anything that changes gastric pH or transit time changes absorption. Food does both.

0 likes in reply to #58 19mo
VK
v.klausenTL3Regular29 Dec 2024#148

Worth separating two things that post #144 runs together.

Oral versus injectable exposure: comparing a 14 mg oral dose with a 0.5 mg injectable dose is comparing apples to a different fruit. The oral bioavailability is low enough that dose numbers are an order of magnitude different and not directly comparable.

4 likes 19mo
AA
an.adeyemiTL2 Moderator29 Dec 2024#149
z.onwuka, post #94: Orforglipron is a small molecule, not a peptide. That changes almost everything: no absorption enhancer required, no fasting window, chemical synthesis instead of peptide synthesis, different analytical methods entirely. Data from peptide agonists does not transfer. Go to post

The SOUL trial: cardiovascular outcomes trial for oral semaglutide in people with type 2 diabetes and cardiovascular disease or chronic kidney disease. It demonstrates that benefit appears to be a property of the molecule and exposure, not specific to the route.

0 likes in reply to #94 19mo
VS
v.salgadoTL2 Moderator29 Dec 2024#150

Dose numbers for oral formulations are not comparable to injectable ones. The 14 mg oral dose is not equivalent to any injectable dose in the traditional comparison sense. They are different formulations with different pharmacokinetics and cannot be put on the same scale.

0 likes 19mo