Topic summary

Albumin binding and how it produces a long half-life

Pharmacology › Pharmacokinetics semaglutide liraglutide worked example tirzepatide missed dose

This is a generated summary. It shows the 6 most-liked posts from a topic of 45, in their original order, with the accepted answer included where one exists. It is a reading aid and it will miss nuance — the full topic is the record.

d.magalhesTL2Member27 Jan 2025#2

Fasting requirement for oral semaglutide: food and large fluid volumes reduce absorption. The fasting window (30 minutes before and 30 minutes after) is designed to maximise absorption. Violating it measurably reduces exposure.

26 likes 18mo

e.halonenTL2 Moderator7 Apr 2025#22

a.villalobos, post #7: On post #3 — agreed on the reasoning, with one qualification. Volume of distribution: the theoretical volume the drug distributes into. For albumin-binding compounds, volume is reduced compared to drugs that do not bind protein. That is relevant to understanding how much free drug is available. Go to post

This follows post #19 rather than contradicting it.

Thank you for the correction. I have edited my earlier post with a note rather than silently, so the thread still makes sense to read. The error was mine and it was the kind that comes from remembering a figure instead of looking it up.

32 likes in reply to #7 16mo

s.mbekiTL2 Moderator18 Apr 2025#26

Bioavailability: oral semaglutide has low bioavailability (roughly 1%) due to peptide instability. That is why the oral dose (14 mg) is so much larger than the injectable dose. Comparing them by mass is meaningless.

24 likes 15mo

v.bhattacharyaTL2 Moderator7 May 2025#33

baseline_table, post #4: post #3 is right about the mechanism and I think understates the practical bit. Bioavailability: oral semaglutide has low bioavailability (roughly 1%) due to peptide instability. That is why the oral dose (14 mg) is so much larger than the injectable dose. Comparing them by mass is meaningless. Go to post

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.

25 likes in reply to #4 15mo

n.nakamuraTL2 Moderator17 May 2025#37

Hepatic metabolism: the degree to which each compound is hepatically metabolised versus renally cleared is known but varies. Severe liver disease changes clearance.

33 likes 14mo

il.dumitruTL2 Moderator30 May 2025#42

27 likes 14mo

Read the full topic (45 posts)

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