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Topic summary

Escalating every six weeks instead of four: what I observed over eight months

This is a generated summary. It shows the 5 most-liked posts from a topic of 32, 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.
NN
n.nybergTL2 Moderator3 Jan 2025#6

post #5 answers the question as asked. The question underneath it is different.

Dose equivalence between different incretin analogues is a weak concept. The molecules differ in structure, half-life, receptor selectivity, and in what has been studied clinically. One mg of semaglutide is not equivalent to one mg of something else in any meaningful sense.

30 likes 19mo
ZO
z.okonkwoTL2 Moderator8 Jan 2025#11

How the published trials escalated: they used specific step sizes and intervals. The STEP programme used a particular cadence; the SURPASS and SURMOUNT programmes used slightly different ones. Reading them side by side shows the variation is real but small.

32 likes 19mo
KO
k.otieno_statsTL3Statistician10 Jan 2025#14
dr_okonkwo, post #10: Steady state means the plasma concentration is stable from dose to dose. That happens around 4 to 5 half-lives. Before that, the concentration is rising with each dose. Escalating before steady state means escalating on incomplete information about the dose you are on. Go to post

Stepping down deliberately: the withdrawal trials show that stopping is followed by regain. The step-down literature is thinner. The conservative assumption is that stepping down is followed by some regain, with the magnitude unknown.

16 likes in reply to #10 19mo
SB
s.balogunTL2 Moderator11 Jan 2025 · edited#15
c.lundgren, post #3: The four-week escalation interval is a convention from the pivotal trials, not a pharmacological constant. The pharmacological argument is that with a week-long half-life, four weeks approaches steady state and you can assess the dose fairly. That is an argument for not going faster. It is not an argument against going slower. Go to post

The arithmetic of an intermediate dose: if the label says 1.0 mg and 2.0 mg, a dose strictly between them is off-label by definition. Some people compute it anyway. The reasoning is pharmacological — e.g., "I will split the difference between steps" — but it is reasoning from theory, not from evidence.

24 likes in reply to #3 19mo
AA
a.adebayoTL2 Moderator20 Jan 2025#28
j.fonseca, post #9: Holding a dose indefinitely: the trials did not study indefinite holding at a non-maximum dose. The trials escalated to a target and then held that. What happens if you stay at an intermediate dose for years is not formally studied and extrapolation is the best available reasoning. 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.

32 likes in reply to #9 18mo

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