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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.

Can I increase my Mounjaro dose early by using two injections?

5 replies

TooHotTodayy · 25/05/2026 14:41

I’m halfway through my second 2.5mg pen of MJ.

I had good weight loss on my first pen (3kg over 4 weeks), and very little side effects so thought I’d stick with it and see how I get on. Except now I’m noticing no difference.

I have two more doses left on this pen before I reorder, so I’m wondering if I can double up the next dose to 5mg (so 2.5mg twice from a 2.5mg pen), before then ordering a 5mg pen.

Does anyone have any experience of this?

OP posts:
RobinHumphries · 25/05/2026 15:48

I did that and had no side effects.

LarksAscending · 25/05/2026 15:59

Yes you can. I skipped to 5 very quickly and never got side effects even at 7.5.

Mysticmaiden · 26/05/2026 20:52

I wouldn't recommend it because weeks 3 and 4 is when it builds up to the highest levels so you don't want to jump up early. What is better is to take it after 5 days and see how you feel with that but you do have to track your food and eat in a calorie deficit to lose weight, I tracked strictly and only had 1 week of slight satiety and reduced food noise on 2.5mg but still lost weekly because I was strict with my food intake.

MysteryParcel · 26/05/2026 20:57

Mysticmaiden · 26/05/2026 20:52

I wouldn't recommend it because weeks 3 and 4 is when it builds up to the highest levels so you don't want to jump up early. What is better is to take it after 5 days and see how you feel with that but you do have to track your food and eat in a calorie deficit to lose weight, I tracked strictly and only had 1 week of slight satiety and reduced food noise on 2.5mg but still lost weekly because I was strict with my food intake.

If I’ve read it correctly, OP is half way through her second pen so is currently on week 6 I think.

Mysticmaiden · 27/05/2026 21:01

MysteryParcel · 26/05/2026 20:57

If I’ve read it correctly, OP is half way through her second pen so is currently on week 6 I think.

Ah I totally missed that!

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