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Evidence-based GLP-1 & peptide discussion since 2023
ForumsDosing & ProtocolsBest time of day to inject? I keep forgetting at night — anyone have experience?

Best time of day to inject? I keep forgetting at night — anyone have experience?

pete_manc_UK Tue, Nov 18, 2025 at 9:36 AM 36 replies 1,634 viewsPage 1 of 8
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pete_manc_UK
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Nov 18, 2025 at 9:36 AM#1

I titrated faster than the label because I felt fine, hit a wall at the third step, and had to come back down — which I now think was the predictable outcome rather than bad luck.

The arithmetic in one line: half-life about a week, so steady state at four to five weeks, so a four-week interval is one steady state per step. Two-week intervals mean every step is dosed onto a rising curve.

What I actually want to know is why the interval is four weeks rather than two, and whether a slower ladder gets to the same place.

Happy to be told the question itself is wrong.

16 11TrialNerd_Beth, HPLC_Greg, LibrarianMeg and 13 others
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PharmD_Rodriguez
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Nov 18, 2025 at 10:10 AM#2

Answering the narrow version, because the broad one does not have a single answer. The trials generally allowed a step to be held or reduced and then retried, and people who did that mostly arrived at the same place a few weeks later. The end point of the ladder is set by tolerability, not by a schedule, and there is no evidence that reaching the top faster produces a better outcome.

That is the short version; the long version is somebody else's post.

15 10TinaHashiRN, robert_kc, dan_philly and 12 others
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LindaRN_retired
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Nov 18, 2025 at 10:44 AM#3
PharmD_Rodriguez said:
The trials generally allowed a step to be held or reduced and then retried, and people who did that mostly arrived at the same place a few weeks…

Agreed on the arithmetic, with one condition: holding indefinitely at a dose that is not doing anything is not patience, it is a stall with a nice name. The distinction is whether appetite has changed at all at the current step.

14 9amsterdam_pete, LondonLisa, mike_nyc and 11 others
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zoe_NC
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Nov 18, 2025 at 11:18 AM#4
pete_manc_UK said:
I titrated faster than the label because I felt fine, hit a wall at the third step, and had to come back down — which I now think was the predictable…

Same position here, arrived at the long way round. Four weeks is the pharmacokinetics, not caution. With a one-week half-life you need four to five half-lives to reach steady state, so at two weeks you are dosing on top of a concentration that has not finished rising. Escalating then stacks exposure and you get the side-effect burden of the higher dose before you have seen the benefit of the current one.

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Dr.SurgeonPGH
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Nov 18, 2025 at 2:28 PM#5

Adding the clinical framing, because it changes how the question reads.

PSA for titration users considering the 0.25mg starting dose: this dose is NOT intended for weight loss. It's a titration dose to let your body adjust. Don't be discouraged if you don't lose much in the first month.

The therapeutic dose for weight management starts at 1.7mg (semaglutide) or 5mg (tirzepatide). Be patient with the ramp-up.

Last edited: Nov 18, 2025 at 5:28 PM
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