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Weight loss injections/treatments

Discuss weight-loss injections and treatments, including personal experiences. Mumsnet hasn't checked the qualifications of anyone posting here. You may wish to speak to a medical professional before starting any treatments.

Restarting Mounjaro at 2.5mg after weight loss and difficult side effects

5 replies

Stillstanding54 · 07/05/2026 13:30

I successfully lost over 4stone and came off MJ last September. Alls been great until the month or so when the food noise and snacking has returned and my weight has slowly started creeping up. Only a few pounds but enough to make me worry.
My prescriber said previously that I could go back on 2.5mg at any time to reboot and keep things under control so I contacted him and we agreed a month or two on 2.5mg My weight is still normal and my bmi is 23
The first week was absolutely fine, a couple of pound off, food noise gone and I felt great
Second week, second day, I was throwing up, felt dreadful and went to bed for 36 hours
Third dose is due today and I’m scared about feeling so ill again…
Could I reduce the 2.5mg by half clicking?
Would that even be worth doing?
Would I be suffering such bad side effects because of being lighter,? I was very obese first time round
Dont want to waste my remaining dose but absolutely do not want to feel as ill as I did last week
Any advice or thoughts from more experienced people appreciated, and thanks for reading

OP posts:
SheDoesntEvenGoHerex · 07/05/2026 14:42

I microdose at 1.25mg from a 2.5mg pen as I was like you, more side effects this time round after a break!

No side affects doing this! Try it! Good luck!

Stillstanding54 · 07/05/2026 15:10

SheDoesntEvenGoHerex · 07/05/2026 14:42

I microdose at 1.25mg from a 2.5mg pen as I was like you, more side effects this time round after a break!

No side affects doing this! Try it! Good luck!

Great, thank you. I wonder if the smaller the body, the greater the effect of the drug! 😉
Will try half dose as I seem to get a good suppression anyway

OP posts:
SilenceInside · 07/05/2026 15:39

Dose isn’t dependent on body size and neither are side effects. Side effects are common on starting and on increasing your dose.

If you're not feeling well you can delay your dose by a couple of days and/or do a half dose by counting clicks and see if that’s any better.

Joannemercer63 · 13/05/2026 21:20

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ButterfliesnWaterfalls · 14/05/2026 08:15

Hi, similar to you OP.

Does it matter what time of day you take the dose?

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