Writing this once so I can stop repeating it across threads. It is about the maintenance and discontinuation question, and it is deliberately narrow — everything I am not confident about is marked as such.
What is actually established
Extending the interval and reducing the dose are pharmacologically different. Reducing the dose lowers the whole exposure curve evenly; extending the interval keeps the peak and drops the trough. Since the appetite effect tracks the trough, interval extension tends to give you good days and bad days rather than a uniformly smaller effect, which most people find harder to live with.
The condition it depends on
The caveat that "maintenance dose" in the literature almost always means the top studied dose. Lower maintenance doses are widely used and thinly evidenced, which is worth knowing before you cite anything as established.
What I am not sure about
What I am after is whether extending the interval works as well as reducing the dose, since they are not the same intervention pharmacologically. Tell me what I have not thought of.
matt_MKE said:Extending the interval and reducing the dose are pharmacologically different.
That is correct as far as it goes, and here is where it stops going. STEP 4 is the study that answers this and it is blunt. Participants who continued kept losing; participants switched to placebo regained about two thirds of what they had lost within a year, and the metabolic improvements faded with the weight. That is the same pattern as every other chronic-disease medication ever withdrawn, and it is an argument about the condition rather than about the drug.
matt_MKE said:Extending the interval and reducing the dose are pharmacologically different.
The regain framing needs pushing back on. Two thirds regained means one third did not, and the trial provided no ongoing support to either group. Treating regain as pharmacologically inevitable is as unsupported as treating maintenance as automatic.
If somebody has the primary source to hand I would rather cite it than paraphrase it.
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Shop Reference StandardsThis one has a reasonably settled answer, so here it is. One third of STEP 4 participants held most of their loss without the drug, and nobody has convincingly characterised who they are. That subgroup is the most interesting unanswered question in the field and it is routinely flattened into the two-thirds headline.
That is the short version; the long version is somebody else's post.
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