Short answer first, then the reasoning. 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.
My problem is day one and day two, not the week as a whole, which is why splitting appealed to me before I read anything about it.
The narrow version of the question is what the pharmacokinetic argument against splitting a weekly dose actually is, since intuitively it should smooth the curve.
Tell me what I have not thought of.
TrialNerd_Beth said:The mechanism that matters here is not stomach emptying, it is central.
That holds for the injectable. The oral formulation has different absorption behaviour and the dose numbers are not interchangeable, which is worth saying out loud because people quote them as if they were.
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Shop Reference StandardsFDA_TrackerJim said:My problem is day one and day two, not the week as a whole, which is why splitting appealed to me before I read anything about it.
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.
Clinical perspective, offered as context rather than as advice.
Dose splitting update on split dosing: instead of 2.4mg once weekly, I've been doing 1.2mg twice weekly (Mon/Thu) with my doctor's approval. The appetite suppression is more consistent and side effects are noticeably milder.
Not medical advice, just sharing what's worked for me. Discuss with your provider before trying this.