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ForumsSemaglutide (Ozempic / Wegovy)Drug interactions with semaglutide — gastric emptying effects Page 2

Drug interactions with semaglutide — gastric emptying effects

SarahChen_PharmD Wed, May 27, 2026 at 3:59 AM 6 replies 365 viewsPage 2 of 2
labquiet_amy
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May 27, 2026 at 11:33 AM#6

Adding the numbers, since they settle part of this. Worth knowing that the injection site changes very little. Abdomen, thigh and upper arm are bioequivalent for semaglutide, so a site change is not a plausible explanation for a bad week.

That is the short version; the long version is somebody else's post.

Last edited: May 27, 2026 at 1:33 PM
18 13TrialNerd_Beth, HPLC_Greg, LibrarianMeg and 15 others
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zoe_NC
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May 27, 2026 at 2:32 PM#7

One thing that is still open after Dr.PeteFamMed’s answer:

Whether fiber actually helps GLP-1 constipation or whether the evidence is borrowed from a different population?

17 12FranDenver, Dr.BariatricHTX, LindaRN_retired and 14 others
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NurseAsh_DET
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May 27, 2026 at 5:31 PM#8
labquiet_amy said:
Worth knowing that the injection site changes very little.

Adding the part of the answer the thread has not reached. The mechanism that matters here is not stomach emptying, it is central. GLP-1 receptor agonism in the arcuate nucleus stimulates POMC neurons and suppresses AgRP/NPY signalling, which is why the effect is appetite and food salience rather than physical fullness. Delayed gastric emptying largely tachyphylaxes over the first months; the appetite effect does not.

16 11BrianDallas92, labquiet_amy, emily_PDX and 13 others
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SarahChen_PharmD
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May 27, 2026 at 8:30 PM#9

OP back with an update, since a thread like this is useless without one.

Water and magnesium first, soluble fiber second, and dropping the bran entirely. Resolved in about a week after two months of getting it backwards.

Last edited: May 27, 2026 at 11:30 PM
15 10TinaHashiRN, robert_kc, dan_philly and 12 others
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DanielChem_CHI
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May 28, 2026 at 10:50 AM#10
NurseAsh_DET said:
The mechanism that matters here is not stomach emptying, it is central.

All true, with one condition: that curve is for people who reached the dose on schedule. Anyone who slowed the ladder for tolerability is on a different, flatter curve, and comparing yourself with the published mean will make you feel like a non-responder when you are not.

37 10nick_SD_fit, ben_calgary, patPC_UT and 34 others
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