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ForumsPharmacology & MechanismsGlucagon receptor signaling — looking for input Page 2

Glucagon receptor signaling — looking for input

gary_naperville Fri, Apr 24, 2026 at 1:24 PM 8 replies 618 viewsPage 2 of 2
Dr.PeteFamMed
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Apr 24, 2026 at 4:43 PM#6

One concrete data point for the thread. Numbers worth memorising for this class: Tmax one to three days for the weekly peptides, terminal half-life about a week for semaglutide and about five days for tirzepatide, steady state at four to five half-lives, subcutaneous bioavailability high enough that site choice is irrelevant.

3 23hyun_seoul, jim_asheville, matt_MKE
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fiona_VT
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Apr 24, 2026 at 6:00 PM#7

One thing that is still open after traveltech_sara’s answer:

Which effects tachyphylax and which persist, because the answer explains why tolerability improves while the appetite effect keeps working?

2 22hans_munich, jason_sac26
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hyun_seoul
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Apr 24, 2026 at 7:17 PM#8
Dr.PeteFamMed said:
Numbers worth memorising for this class: Tmax one to three days for the weekly peptides, terminal half-life about a week for semaglutide and about…

Coming at Dr.PeteFamMed’s question from a different direction. 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.

Correct me if the detail matters more than I have assumed.

1 21MASHdoc_SA
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gary_naperville
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Apr 24, 2026 at 8:34 PM#9

Closing the loop on my own question.

Update — tachyphylaxis to the gastric effect, persistence of the appetite effect. Two curves, and I had been watching the wrong one.

Last edited: Apr 24, 2026 at 11:34 PM
50 20PharmHunterJen, TomTeleRx, DoseLogDan and 47 others
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lisa_labSD
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Apr 25, 2026 at 2:45 AM#10
hyun_seoul said:
Almost every unanswerable question in these threads is unanswerable because three things changed in the same fortnight, and no amount of subsequent…

Right, and the exception is worth naming rather than left implied, because the exception is where people get into trouble.

Correct me if the detail matters more than I have assumed.

48 23cory_ATX, lori_vegas, Dr.PulmRoch and 45 others
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