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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.

Has anyone stayed on a low dose of Mounjaro rather than increasing?

60 replies

SherbetDipDap · 16/07/2026 14:12

I’m currently in my third week of taking Mounjaro. I started at a BMI of 28-29, hoping to lose around 15-18kg so not a huge amount but enough that I was aware that I needed to get on top of my binge eating before it took over my life.

So far it’s been really great. It’s completely switched off my constant hunger and sugar cravings, I actually feel full and stop eating during meals, and I’ve had no side effects beyond mild nausea. I’m down about 5kg (trying to only weigh myself weekly and not fixate on numbers) and am eating roughly 1,200-1,500 calories per day.

I need to order my next pen. Would it be unreasonable to stay on 2.5mg? I feel like this dose is working well for me, and I don’t want to end up under fuelling for exercise (I train 5-6 times per week) or rapidly lose weight only to pile it back on again. Slow and steady is better than rushing things, right? My only concern is that I get to week 5 and find that it’s not enough and have to wait three weeks to go up a dose..?

Has anyone else just stayed on a low dose?

OP posts:
TheGreyBee · 19/07/2026 22:22

SilenceInside · 19/07/2026 22:16

@TheGreyBee it’s on the paper leaflet that comes with each pen. Many people misunderstand it.

I’m sure the pens are probably fine for longer but the manufacturer hasn’t got the evidence to prove it for patient safety so they won’t be suggesting it until/if they do get that data.

And of course they want us all to buy more pens and spend even more money.

SilenceInside · 19/07/2026 22:26

I’m not seeing a conspiracy to fool customers for the sake of profit to be honest. If they don’t have the data that the medication is stable and remains uncontaminated for more than 30 days, they don’t have it. And as you can see from this thread, people do want they want regardless, so Lilly aren’t going to be able to prevent anyone for using a pen well past the use by guidance.

KathrynHollis · Yesterday 18:19

This reply has been deleted

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reluctantbrit · Yesterday 20:17

It's not a money making machine. Medications are licensed for certain usages and that's because they are tested on these conditions.

Maybe in the future there will be different sizes or they realise a shelf life in the fridge of more than 30 days is safe. The new tablet form may change things as they are cheaper than the jabs so we will see.

I never count clicks, I do the full dose and for me it works. Anyone has to make their own decisions if they want to do 1/2 doses.

apricotdreams · Yesterday 21:07

MeridaBrave · 19/07/2026 18:55

i have stayed on 2.5mg and saved money by ordering a 5mg pen every 8 weeks 😀

@MeridaBrave which provider lets you order every eight weeks? I plan to do this but I thought maximum between orders is 6-7 weeks

MeridaBrave · Yesterday 22:50

apricotdreams · Yesterday 21:07

@MeridaBrave which provider lets you order every eight weeks? I plan to do this but I thought maximum between orders is 6-7 weeks

Swift doctor.

itsanamething · Today 08:11

apricotdreams · Yesterday 21:07

@MeridaBrave which provider lets you order every eight weeks? I plan to do this but I thought maximum between orders is 6-7 weeks

Chequp also allowed up to 8 weeks between orders. I've not used them recently though.

somekindof · Today 13:26

Question for those doing half doses/counting clicks - how do you get enough needles? @MeridaBrave

SilenceInside · Today 13:30

@somekindof many pharmacies send a couple of spare needles with each order, so 5 or 6 needles instead of 4. You can build up a stash of spares that way. Really, all pharmacies should send out more than 4 in case of issues with a wonky needle.

Or, you can buy a box of 100 from any online pharmacy eg https://www.chemist-4-u.com/carepoint-ultra-pen-needles-32g-4mm-pack-of-100?ppc=1&ppc=1&gad_source=1&gad_campaignid=23689020126&gbraid=0AAAAADMV1WTqHC2o1tC0DSKE6SP_8f9w4&gclid=CjwKCAjwsfzSBhB5EiwAOGyqSTmEDt3y-qRiISRiS96I-WICf2LgDuf0zSCOi_to0SUaT0GPNlkD9xoCVIIQAvD_BwE

MeridaBrave · Today 16:21

somekindof · Today 13:26

Question for those doing half doses/counting clicks - how do you get enough needles? @MeridaBrave

You can buy a box of needles and wipes.

As it happens I started with Shemed and they sent a box of 100 needles and 100 wipes but after that pens came without needles or wipes. I’ve moved away from Shemed but still have loads of needles left!!!

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