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Evidence-based GLP-1 & peptide discussion since 2023
ForumsSide Effects & ManagementHeadaches on GLP-1 — 6 month update

Headaches on GLP-1 — 6 month update

EndoResFellow Wed, Jan 28, 2026 at 1:40 AM 10 replies 856 viewsPage 1 of 2
EndoResFellow
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Jan 28, 2026 at 1:40 AM#1

Nausea arrived on day two of each dose step, lasted about four days, and disappeared entirely by the second week — until the step where it did not.

The narrow version of the question is what distinguishes the nausea you can titrate through from the nausea that means stop.

Tell me what I have not thought of.

36 6robert_kc, dan_philly, MeganSA_TX and 33 others
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TirzTom
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Jan 28, 2026 at 1:53 AM#2

Short answer first, then the reasoning. The practical protocol is dull and it works: smaller meals, stop eating at the first sign of fullness rather than at the end of the plate, drop the fat fraction of meals in the two days after dosing, and do not lie down straight after eating. Most of what people call unmanageable nausea is a meal-size and meal-composition problem interacting with a stomach that is emptying slowly.

35 5tom_AK, josh_phd_bmore, roxy_nash and 32 others
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jason_sac26
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Jan 28, 2026 at 2:06 AM#3
TirzTom said:
The practical protocol is dull and it works: smaller meals, stop eating at the first sign of fullness rather than at the end of the plate, drop the…

Agreed on adaptation, with a caveat: adaptation applies to gastric emptying and not to everything. If your problem is the aversion rather than the fullness, waiting does less, because the aversion is central and it is the mechanism working as intended.

34 4stefan_berlin, Dr.EM_Chicago, pete_RVA and 31 others
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ChrisMacros
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Jan 28, 2026 at 2:19 AM#4
EndoResFellow said:
Nausea arrived on day two of each dose step, lasted about four days, and disappeared entirely by the second week — until the step where it did not.

Can confirm the pattern EndoResFellow describes. Holding genuinely reduces total burden rather than redistributing it, because the gastric-emptying component adapts. Receptor-level tachyphylaxis to the delayed-emptying effect develops over weeks while the central appetite effect persists, so the same dose is materially more comfortable at week six than at week two. A slower ladder therefore reaches the same dose with less cumulative nausea, not the same nausea spread thinner.

Last edited: Jan 28, 2026 at 5:19 AM
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Dr.ObesityMed
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Jan 28, 2026 at 3:25 AM#5

From the other side of the consultation, briefly. Take it one variable at a time. Almost every unanswerable question in these threads is unanswerable because three things changed in the same fortnight, and no amount of subsequent argument can untangle them after the fact.

32 2A1cHero_PHX, Dr.RenalNash, LipidDoc_ATL and 29 others
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