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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.

3.75mg dose from 5mg pen

5 replies

Springbaby2023 · 24/11/2025 11:54

Hi all, couldn’t decide whether to stick at 2.5mg or go up to 5mg for my next order after but think it’s better value to do 5mg. Now I’m wondering - can I do a 3.75mg dose by just clicking it 45 times? And if so - do I then get five doses, or will I still only get four? Not sure if pens are built to only ever give four doses, no matter how big that dose is?

OP posts:
SilenceInside · 24/11/2025 11:57

Yes, you can do 45 clicks for a 3.75mg dose from a 5mg pen. The pen does 240 clicks (4 x 60), rather than 4 doses. So you can do 5 doses of 45 clicks, as that's 225 clicks.

Springbaby2023 · 24/11/2025 12:01

@SilenceInside thank you! I figured you could but didn’t want to accidentally muck the pen up. I think that might be a good step up for me - mainly because I don’t want to feel rubbish over Christmas.

OP posts:
HappyWineDay · 24/11/2025 14:23

Going from 2.5mg to 5mg is a big step up and lots of people experience side effects when doing so, so what you're planning makes sense.

Springbaby2023 · 24/11/2025 14:28

@HappyWineDay thank you, I’m going to give it a go. I was initially going to stick at 2.5mg but this week I found for the last couple of days I literally had zero suppression and then stayed the same on today’s weigh in so I think my body is saying it’s time to step up a bit, just don’t want to feel rubbish over Christmas.

OP posts:
SilenceInside · 24/11/2025 14:32

I went up to 5mg after the 4 weeks on 2.5, but back then (summer 2024) there was a lot less discussion about in-between doses via counting clicks and I was also was a bit nervous of not following the suggested dosing schedule. In hindsight, I had plenty of suppression on 2.5mg and probably could have stayed on that dose for another month, or done 3.75mg instead. I was ok for the first couple of weeks on 5mg but then had some D&V for the third week, although it settled quickly.

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