Topic summary

Follow-up: Why "dose equivalence" between different incretin analogues is a weak concept

Practice › Dosing & titration dose reduction worked example tirzepatide missed dose semaglutide Solved

This is a generated summary. It shows the 5 most-liked posts from a topic of 12, 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.

s.achebeTL2 Moderator11 Sep 2025#2

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.

14 likes 11mo

n.torrenceTL3Regular15 Sep 2025#3

br.wikstrom, post #1: Asking directly, because I could not find a straight answer: Why "dose equivalence" between different incretin analogues is a weak concept Reporting something rather than asking about it, in case the pattern is useful to anyone else. Over 12 weeks I logged this consistently: date, dose, time of day, and a simple severity score from 0 to… Go to post

post #2 is right about the mechanism and I think understates the practical bit.

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.

29 likes in reply to #1 10mo

e.ferrariTL2 Moderator Solution27 Sep 2025#6

s.silva, post #5: Picking up post #2: that is the part I would want checked first. 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. Go to post

Splitting a weekly dose in two: the pharmacokinetic argument against is that you want the benefit of long half-life, which gives a slowly changing plasma level from a weekly dosing schedule. Splitting it flattens the curve further but loses the convenience of once-weekly dosing. The trade-off is convenience versus a slightly flatter concentration curve.

20 likes in reply to #5 10mo

d.nwosuTL2 Moderator10 Oct 2025#10

Knowlton, post #7: Titrating on tolerability rather than on the calendar: some people escalate when they tolerate a dose well, others escalate on the prescribed schedule regardless. The published trials used a calendar-based schedule. Tolerability-based escalation has no formal evidence base but is not uncommon in practice. Go to post

I read post #8 twice before replying, because I had assumed the opposite.

When a dose reduction is the correct response to a side effect: if a side effect is dose-dependent (nausea, constipation, injection discomfort), reducing the dose is a reasonable response. If the side effect is not dose-dependent (e.g., hypoglycemia with insulin), dose reduction does not address the issue.

28 likes in reply to #7 10mo

s.ivaturiTL2 Moderator13 Oct 2025#11

Micro-titration: the concept of increments smaller than the labelled steps. It has no evidence base from trials but is described by some people. The downside is that very small increments are hard to measure accurately with a syringe.

11 likes 9mo

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