Taking the question as asked, rather than the general version of it. 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.
Started at 0.25mg with a fairly bad first week, held each step the full four weeks, and I am now at 1mg with no side effects worth naming.
The bit I cannot resolve on my own is how much of the between-person variation is pharmacokinetic and how much is just adherence measured badly.
Numbers rather than impressions, if you have them.
BethLabQueen said:The mechanism that matters here is not stomach emptying, it is central.
Agreeing with BethLabQueen, and the qualification matters more than the agreement. Albumin binding above 99% is the whole reason weekly dosing works, and it is also why the trough matters more than the peak. People who dose late are not losing a peak, they are letting the trough fall, and the appetite effect tracks the trough.
I would rather be corrected than agreed with, if it comes to it.
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Browse GL BiochemSkepticalSean said:Started at 0.25mg with a fairly bad first week, held each step the full four weeks, and I am now at 1mg with no side effects worth naming.
Agreed, though "tolerable" needs defining. A dose you tolerate by eating almost nothing is not tolerated, it is being paid for somewhere else — usually in lean mass, sometimes in adherence three months later.
Clinical perspective, offered as context rather than as advice.
SkepticalSean said:...but the FDA says semaglutide...
Interesting point. I want to add some regulatory nuance: the FDA labeling reflects the specific clinical trial data submitted for approval. Real-world clinical practice often extends beyond the FDA label based on emerging evidence and clinical judgment.
Example: semaglutide was first approved for diabetes (Ozempic), then obesity (Wegovy). The molecule didn't change — our understanding of its applications expanded. Similarly, semaglutide may evolve as more data accumulates.