r/MounjaroAus

I have been on Mounjaro since March 2025 with a starting BMI of 30.1. My current BMI is 25.1. I am short and don’t carry the excess weight well and I was having some other health issues and my doctor recommended losing some weight. Initially I had lost more than 15kg but had noticed the weight starting to creep back on so on Sunday 9th August I decided to give myself a 2.5mg dose. I had the usual feeling of fullness/indigestion type feeling for the first two days post. On the morning of the 10th I had an episode of diarrhoea. I wasn’t too concerned until later in the morning I had to turn around from a lunch date with friends and become friends with my toilet. I also had significant abdominal cramping pain. I continued to have profuse diarrhoea and severe abdominal pain for the next two days. Eating even crackers was rewarded with intense diarrhoea and pain. I wasn’t keeping up with fluid intake. On the 15th I presented to hospital and was admitted post CT with proctocolitis. Intravenous fluids and pain relief were most welcome.

I continued on clear fluids for the next two days and then was allowed to try a light diet. I again had severe abdominal pain and diarrhoea which only stopped when all the ‘offensive’ food had been evacuated. The pain was again intense and I was forced to resort to strong pain medication. I had one of the most miserable nights of my life.

My bloods remained normal - no raised inflammatory markers. My stool specimens have come back normal. My temperature was normal. No signs of infection.

Today the 19th of August I still have a slight constant stomach ache. However I have managed to eat a light diet at lunch and dinner with no return of symptoms. All being well I will be discharged tomorrow morning after 5 nights in hospital. I will still need to be on a light diet until the niggly pain in my stomach goes away.

Was it Mounjaro that caused this week of misery? I know my doctor was very puzzled with how I was presenting and was surprised my first trial of a light diet was such an abysmal failure. I just know I’m never going to have another dose of Mounjaro to test it out. I will say perhaps I don’t have the full picture yet as I still need to have an endoscopy/colonoscopy in a couple of weeks to rule out other causes.

I’ll be doing my first injection tomorrow and I’m still undecided about whether to do it in the morning or evening. I have Fridays off work, so I was thinking Thursday might be a good day to start.

I’m a little nervous about setting up the pen and getting the clicks right 😅

I’ve got around 15 kg to lose (SW 78kg), so I’d love to hear from anyone who’s recently started. Any tips, advice or encouragement would be very much appreciated!

What's the best value mounjaro to get? I'm going to the cheapest chemist I can go to.

Can you ask your doctor to write a script and get the mounjaro in another country like India legally? Has anyone ever done this?

So I’ve been on MJ for about 4 months. I have been “dieting” for my whole life and the only time I was at a normal weight was when I was in my late teens eating 1000 calories a day and burning 1000 calories at the gym (I didn’t know any better at that time).

MJ has given me so much mental freedom and I finally feel like a normal person around food. I’m about 5kg from my first goal, but could stand to lose another 5kg after that.

I’ve seen 2 GPs and asked them about their thoughts on Mounjaro long term. Both of them want me to get off it once I hit my goal, even though I told them that I see this as a long term, forever kinda deal.

I really want to find a GP who is supportive of being on this medication long term. Im happy to go with online options or a in person GP in Melbourne. What I want to avoid are steep costs. I’m click counting 5mg from a 15mg pen and not paying for the GP appointments. If I go with online providers how much could I expect to be paying with them?

Hi,

Hope this isn't the wrong place for this kind of content, but I thought it might be useful to keep track of my own journey on this such that others can have a data point to compare to. I'll be open and honest about everything good and bad.

Pre-Mounjaro

Body type: Obese

Age: 42

Height: 183

Wight: 120kg (Mostly in belly fat)

BMI at start: 36.2

Comorbidities: Depression, Bad back (lumbar spine, 1x disc degradation leading to bone on bone contact), Asthma, Sleep Apnea (since age 27, ironically before I was even overweight), fatty liver disease

For context, in 2020 before my back was injured i was ~83kg.

Tracking: Effects and weight using Glapp. Food intake with myfitnesspal.

Mounjaro Commenced August 2026

2.5 mg dose.

Week 1:

Hunger & Food Noise: Hunger disappeared. Food noise reduced dramatically. Although I still need the odd snack, I am no longer using snacks to avoid work or other responsibilities. It seems there has been a mentality shift (could well be a placebo).

Food Intake: With my hunger basically gone and food noise reduced heaps I was eating much less. And I was making better choices because I am tracking with myfitnesspal. (e.g. feel like takeout? macdonalds is like a days intake in a single sitting. switch to a burrito bowl for half the calories.)

Weight loss/gain: 1.87kg loss

Mood: Mood has improved. Probably because I see a way out of the situation I was in before.

Side effects: In the first week these were quite bad. These would all come and go: Dizziness, Bloated, Belching, Headaches, Abdominal pain, Nausea, Vertigo. Reflux was off the charts for about 4 days. Diarrhea was quite bad for 24 hours about half way through the week, I was shitting water. I must say that one of the effects of eating much less is that energy levels are not as high. I probably wouldn't be able to lift much at the gym.

For those of us who get the red/itchy injection site rash - does how much you lose weekly match how red/itchy your rash is? Because I swear the itchier mine are the more I lose that week! Probably in my head but curious if anyone else has the same experience 😂

I initially lost 12kg on Mounjaro… and then I gained 17kg. All my progress lost. I stopped taking it because I was so upset and gained more weight. Now I’m at my heaviest ever. I’ve never been this heavy and feeling so embarrassed and demotivated. Don’t even want to go to my GP for a repeat because I’m embarrassed that I’m fatter than the last time she saw me months ago. She won’t give it to me if I’m gaining weight. Help.

Hi, currently splitting 5mg doses from a 10mg pen by click counting. Up to my fourth dose on Saturday, will the pen lock up after a while? Like how it does after the final dose.

I also wasn't able to get the "golden dose" from my 2.5mg as I wasn't able to buy any needles in time. I noticed that pharmacies keep their needles secure and won't sell if I'm not on the registered diabetes scheme. Not sure how I feel about the safety of using Amazon, what do you guys use?

Thankss

So I started Mounjaro about a year ago and managed to hit my goal weight. I gradually weaned off it and came off completely a couple of months ago.

Alas, the food noise returned with a vengeance, as did the binge-eating stuff. My doctor and I agreed that I’d probably benefit from staying on a maintenance dose, so I restarted at 2.5 mg.

After only three weeks back on it, I’m already back at my goal weight. The 2.5 mg is doing exactly what I need it to do in terms of controlling the food noise and binge eating, so I’m reluctant to mess with something that’s working. At the same time, I don’t want to keep losing weight.

I’m curious how others in this position have handled maintenance. If you need to stay on Mounjaro to keep the food noise under control, but don’t want to lose any more weight, how do you actually maintain? Have you found that your weight eventually stabilised while staying on the same dose, or have you had to deliberately change how or what you eat to stop yourself continuing to lose?

I’d be interested to hear what others would do in my situation.

I’m 49 and in perimenopause (not taking anything for that). I’ve been on Mounjaro 2.5mg for about 11 weeks and have stayed on that dose because it has continued to control my appetite pretty well.

I started at 147kg and I’m 139.4kg today, so I’ve lost 7.6kg (just over 5% of my starting weight).

My loss has slowed down quite a lot though:

• June: 4.5kg lost
• July: 1.9kg lost
• August so far: 0.5kg lost

For roughly the last three weeks I’ve mostly been bouncing around 139–140kg, despite eating considerably less than I did before Mounjaro (daily calories are at ~1500 if not less on the days I don't feel like eating much). I'm prioritising protein and low carb.

The confusing part is that my waist and hip measurements have gone down and my face is noticeably slimmer, so I can see that my body is changing a bit even though the scale is barely moving.

Until now the appetite suppression on 2.5mg has been really good. This week I’ve noticed a bit more hunger, including in the first couple of days after my injection. It’s still completely manageable, just a little different from previous weeks.

Side effects on 2.5mg have been mild and manageable. I’m also taking 500mg modified-release metformin.

I’m not particularly interested in losing weight as fast as possible. I’d happily stay on 2.5mg if my weight continues trending down, even slowly. My concern is that the scale seems to have more or less stopped doing that recently. Not completely, but it's obviously very slow. 0.5kg or so in the last three weeks.

Moving to 5mg will also cost me about $100 AUD more per month, so I don’t want to increase just because that’s the standard schedule if 2.5mg is still (mostly?) doing the job.

For people who stayed on 2.5mg longer than four weeks, did you eventually start losing again after a few weeks at the same weight? Did you notice your measurements/body changing even while the scale was stuck? Or did a plateau/slight increase in hunger turn out to be the point where moving to 5mg made a noticeable difference?

What would you do: give 2.5mg a bit longer or discuss moving to 5mg?

I'm going to italy next week for 3 weeks and then my wedding is 2 months after, I still would like to lose 4-5kgs but I'm happy with me weight at the moment

I am using a 10mg pen and the click method for 6mg which has been a good sweet spot to me, mild symptoms apart from when I eat fatty/heavy foods I will feel nauseous for a bit

I am tempted to only dose about 4mg on the trip because I don't want to be super sick from all the rich food

Has anyone done this and what was your experience like?

I’m about 5-10kg away from glory. I have been prescribed the above. Has anyone here taken it?

Hey, where is everyone getting GLP-1s in Australia? I was going through my weight loss clinic but it was kind of suss and I don't know if it's a real doctor. I'm now looking at Juniper, I had to answer more questions before my call and they seem more legit. They're a bit more expensive but they seem to have more peopel with actual results and more adds on - want to know if anyone has gone with them or where most people are going?

What is your Coffee/caffeine Intake Since Using Tirzepatide? I am 6 days into my first shot of 2.5mg of Tirzepatide and my caffeine intake has significantly decreased. I work a desk job and I used to drink at least 3 strong coffees throughout the day to keep me going. Now I’m down to one coffee per day without trying to reduce my intake. I feel like I have more energy day to day.

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Please help. 5mg originally gave me excellent appetite suppression and removed all cravings for 3 months. I then dropped to 2.5mg because of diarrhoea, but lost all the benefits so then went back to 5mg two weeks ago.

This time the appetite suppression is weaker on 5mg (food nose and cravings still present), and the diarrhoea worse, lasting longer.

I desperately want to increase to 7.5mg to achieve the suppression I got previously, but the diarrhoea is debilitating.

Im worried the prescribers will stop prescribing glp-1 meds if i come clean about it as i have had kidney injury in the past (they’re strict in the UK)? I am desperate to lose weight.

What should i do? Should i just wait a few more weeks to see if the diahrroea reduces? Or just jump up to 7.5mg? I want the cravings and food noise gone again.

I’ve been on 2.5, 3.75mgs and each time starting the doese that week my weight has gone down each time. I got down to 63.2kg but then my weight slowly went up to 64 over and was like this for a bit. I started 5mg a week ago and my weight has gone up now to 64.15.

It’s a strange feeling for me to go up a dose and not see immediate weight loss on that week? (Even if 0.1kg!)

Ideas? :( my food habits are the same. I still feel like snacking though so that hasn’t gone yet on this new dose. Though I do stop when I’m full etc