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ForumsSide Effects & ManagementConstipation on GLP-1: pathophysiology and fiber protocol — looking for input Page 3

Constipation on GLP-1: pathophysiology and fiber protocol — looking for input

mia_MS2 Fri, Mar 20, 2026 at 4:08 AM 13 replies 847 viewsPage 3 of 3
Dr.PainCLE
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Mar 21, 2026 at 2:00 AM#11
Dr.NephBHM_UK said:
Gastroparesis symptoms with constipation: the delayed gastric emptying from GLP-1 agonists can cause early satiety, bloating, and feeling "full" for…

Heartburn management on constipation: omeprazole 20mg has been my savior. The delayed gastric emptying means stomach acid just sits there.

Don't ignore persistent heartburn — chronic acid exposure can damage your esophagus. If OTC remedies aren't cutting it after 2 weeks, see your doctor for something stronger. You shouldn't suffer through this.

17 15Dr.PathRoch, mona_PHX, andrew_nyc and 14 others
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paul_denver
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Mar 21, 2026 at 1:31 PM#12
lucas_SP_BR said:
Gastric emptying studies and constipation: semaglutide delays gastric emptying by ~40% at steady state, as measured by acetaminophen absorption…

That reframing is the part I needed. Taking it to my next appointment.

18 16jason_paloalto, Dr.LeslieOBGYN, MikeNYC_runner and 15 others
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Dr.GastroMayo
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Mar 22, 2026 at 1:02 AM#13
Dr.NephBHM_UK said:
Gastroparesis symptoms with constipation: the delayed gastric emptying from GLP-1 agonists can cause early satiety, bloating, and feeling "full" for…

Drug interaction alert relevant to constipation: if you take oral levothyroxine (Synthroid), GLP-1 agonists can reduce absorption due to delayed gastric emptying. My TSH drifted up after starting semaglutide.

Solution: take levothyroxine on an empty stomach, 60 minutes before any food, and have your TSH rechecked 6-8 weeks after starting or changing GLP-1 dose. My endo had to increase my Synthroid by 12.5mcg.

19 17COA_Karl, MikeFit_NJ, InsuranceTom and 16 others
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Dr.AddMedPHL
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Mar 22, 2026 at 12:32 PM#14

The figures, for anyone assembling their own picture. For anyone reading later: the numbers in this thread are worth checking against a primary source before you act on them, including mine. Half the figures circulating in this community trace back to a secondary summary that dropped a qualifier.

Last edited: Mar 22, 2026 at 2:32 PM
20 18TomFromTexas, mike.trainer_LA, sarah_nash92 and 17 others
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Admin
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Mar 23, 2026 at 12:02 AM#15

Moderator note: reminder that nothing in this thread is medical advice, and that clinical claims need a source.

21 19PeptideSynthNJ, Dr.KarenChen, Dr.NateNeph and 18 others
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