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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.

Liquid left in pen

34 replies

Pob13 · 04/01/2026 10:42

I have just had my fourth dose of my first pen of mounjaro, and there is still liquid in the pen. It looks like almost enough for another dose. Is that normal? I dont want to just throw it away!

OP posts:
NotDarkGothicMama · 04/01/2026 10:44

It's normal.

bebopalula111 · 04/01/2026 10:46

It’s called the golden dose and not recommended to be used. Some people, myself included have purchased single needles from Amazon and withdrew it manually for use. This is quite tricky however the needle is longer and you need a firm grip and be brave to administer. I’ve stopped as I couldn’t cope with the needle.

SilenceInside · 04/01/2026 10:47

Yes it’s normal. It’s what you might have seen referred to on social media or on here as a “bonus” dose or a “golden” dose. I dislike that twee language personally.

You can’t access the left over medication normally as the pen locks after doing 4 normal doses. You can try to forcibly twist the pen again, past it’s locking point. If it releases, then you can do another dose as normal. But it can be hard to force it like this, and sometimes the whole internal mechanism breaks and the pen no longer functions. So, you can instead buy 1ml syringes from an online pharmacy, and use those to manually extract the medication. If you do that you need to be ok with working out what amount you need for a normal dose (0.6ml), and doing a subcutaneous injection with a syringe.

AnnaQuayInTheUk · 04/01/2026 10:48

It's perfectly normal. I just bin it.

random223 · 04/01/2026 10:49

Yes that is the bonus or golden dose. It is really extra liquid for priming etc. It is not recommended by the manufacturers but a lot of people on here use it as an extra dose to keep the costs down. You will need an insulin syringe to get it out as the pens stop working after four doses.

Pob13 · 04/01/2026 11:09

Thanks all. Seems like such a waste!

OP posts:
ShawnaMacallister · 04/01/2026 11:11

Use it then! It's an entire extra dose. You just need some needles and to extract it yourself, it's extremely easy.

BeardedBarley · 04/01/2026 11:13

I just bought the syringes recommend on numerous threads on here - easy peasy to extract and inject the last dose. Seemed criminal to me to waste it.

Flowers999 · 04/01/2026 11:15

Its the 5th dose. Use an insulin syringe to withdraw its enough for a 5th dose. I have used MJ for 12 months and lost 7 stone and always used the 5th dose.

Have a look on the reddit thread r/mounjarouk loads of useful info.

Itscoldouthere · 04/01/2026 12:03

Pob13 · 04/01/2026 11:09

Thanks all. Seems like such a waste!

But you don’t have to waste it, you can choose to use it, lots of treads here showing links to syringes to extract, it really is easy, I know some don’t use but I feel like it’s just throwing good meds/money away.
They do plan to take the extra dose out so at some point, probably this year, then it will no longer be an option, but whilst it’s still there it is available to you and is still being used within the 30 days if you are worried about that.

morbidcuriosity · 04/01/2026 12:27

Use it. 5 weeks instead of 4. No brainer.. get some syringes i use uk medi website to order. There will be a bit over a full dose. 0.6ml is a full dose. Anymore will just mean a stronger dose taken.

twilightcafe · 04/01/2026 12:30

I can't believe people bin the extra dose. That's £50+ wasted.

OrlandointheWilderness · 04/01/2026 12:30

I’ve always just twisted the top in my teeth 😂 it forces it to release another dose then inject as normal. Takes some strength but it’s worked for me for the last 14 months!

Angelabdc · 04/01/2026 16:34

Not with my teeth but I have successfully used a set of pliers to force it. Haven't actually used the dose though.

AnnaQuayInTheUk · 04/01/2026 16:47

twilightcafe · 04/01/2026 12:30

I can't believe people bin the extra dose. That's £50+ wasted.

I don't pay for mine.

I'm not buying syringes and faffing around to try and make a pen last longer when I can get a new one every four weeks.

Flowers999 · 04/01/2026 16:50

AnnaQuayInTheUk · 04/01/2026 16:47

I don't pay for mine.

I'm not buying syringes and faffing around to try and make a pen last longer when I can get a new one every four weeks.

Well most people do have to pay unfortunately so it is worth 'the faff'.

Bones75 · 04/01/2026 16:50

AnnaQuayInTheUk · 04/01/2026 16:47

I don't pay for mine.

I'm not buying syringes and faffing around to try and make a pen last longer when I can get a new one every four weeks.

if you get them free then obviously you don't have to faff around 🙄

susiedaisy1912 · 04/01/2026 16:51

Yes it’s normal I use that extra dose every single time with no issues. Always have done.

twilightcafe · 04/01/2026 16:52

AnnaQuayInTheUk · 04/01/2026 16:47

I don't pay for mine.

I'm not buying syringes and faffing around to try and make a pen last longer when I can get a new one every four weeks.

Well, when north of £180 is coming out of my bank account every month - damn right I'm getting my money's worth!

WhoInvitedHer · 04/01/2026 17:42

Is it the same with WG?

ShawnaMacallister · 04/01/2026 17:49

WhoInvitedHer · 04/01/2026 17:42

Is it the same with WG?

No, wegovy doesn't have the same amount left over

AnnaQuayInTheUk · 04/01/2026 18:01

Flowers999 · 04/01/2026 16:50

Well most people do have to pay unfortunately so it is worth 'the faff'.

I completely understand that, but I was responding to the poster who said I was effectively binning £50 by not using the syringe method for an additional dose.

The OP didn't say if she was paying for her prescription or getting it on the NHS

ShawnaMacallister · 04/01/2026 18:04

AnnaQuayInTheUk · 04/01/2026 18:01

I completely understand that, but I was responding to the poster who said I was effectively binning £50 by not using the syringe method for an additional dose.

The OP didn't say if she was paying for her prescription or getting it on the NHS

Well you're binning the valuable medication it's just being paid for by the taxpayer rather than you!

Housewife2010 · 04/01/2026 18:09

For those posters who use their teeth, please don't! You may end up spending more at the dentist than you save on MJ!
Like previous posters I buy extra syringes from UK Medi. They're cheap and very easy to use.

AnnaQuayInTheUk · 04/01/2026 18:18

@ShawnaMacallister that's a ridiculous argument. I have a repeat prescription that delivers a pen every four weeks, because that's the dosage in the pen.