How Mounjaro dosing generally works
Mounjaro is a once-weekly injectable medicine. According to the electronic Medicines Compendium (eMC), it is typically introduced at a low starting dose, with the prescriber reviewing and adjusting upward at set intervals — the pace and end-point of that process depend on your individual response and tolerability, not on a fixed timeline that applies to everyone.
The available dose strengths
Mounjaro is available in several dose strengths. The ones commonly referenced are 2.5 mg, 5 mg, 7.5 mg, 10 mg, 12.5 mg, and 15 mg. Each strength comes as a pre-filled pen. For more detail on the 5 mg Mounjaro dose — one of the early stages many people move through — there is a dedicated page covering what to expect at that point in the journey.
What about the volume (ml)?
Each Mounjaro pre-filled pen delivers a fixed volume regardless of the dose strength, so you do not need to measure out millilitres yourself. If you are curious about how many ml the 5 mg Mounjaro pen contains, check your patient information leaflet or ask your prescriber — the figure is product-specific and your leaflet is the most reliable source.
Who decides when to increase?
Any decision to move to the next dose strength — or to stay longer at a current one — belongs with your prescriber. They will consider how you are tolerating the medicine, any side effects you have experienced, and your wider health picture. Never adjust your dose on your own initiative. If you are preparing for your first dose of Mounjaro, your prescriber will have given you specific instructions; follow those rather than general information online.
average weekly weight change in the first 16 weeks of Mounjaro & Wegovy use*
Tracking the right four numbers — weight, waist, protein and dose — turns a noisy chart into a clear story. That's the loop GLP-1 users keep coming back for.
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Tracking your Mounjaro doses with GLP Trackr
While the dose decision itself always sits with your prescriber, keeping an accurate log of every injection is something you can do — and it matters more than it might seem.
GLP Trackr's dose logging feature lets you record each injection as it happens: the dose strength, the date, and the time. Over weeks and months, that builds a clear, timestamped history of your treatment. When you attend a follow-up appointment, you can share that record with your prescriber rather than trying to recall details from memory.
The app also sends gentle weekly reminders so a dose is not accidentally missed, and its Mounjaro dosing guide hub brings together the wider context around managing your injections. If you have missed a dose, log it in the app and contact your prescriber or doctor for guidance on how to proceed — dose decisions, including what to do after a missed injection, are always for them to advise on.
Alongside dose logging, the side-effect tracker lets you note anything you notice after each injection — useful information to bring to your next appointment rather than relying on memory.
Always follow the guidance your prescriber has given you about your dose. If you have any questions about your current or next strength, ask them directly — they know your full health history and are the only appropriate source of personal dosing advice.
Ready to keep a clear record of every injection? GLP Trackr is free to try for seven days — download it on the App Store or Google Play and log your first dose today.
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Morning Check-In
Start every day with a 60-second wellness check-in. Log how you're feeling, track nausea, appetite, energy, and mood — giving you and your care team a complete picture of how your medication is working.
Injection Tracking
Log every dose with a single tap. Track your dose history, phase in your cycle, estimated medication levels, and upcoming injection dates — with reminders so you never miss a scheduled shot.
Hydration Reminders
Staying hydrated is especially important on GLP-1 medications. Set daily water targets, log intake throughout the day, and receive smart nudges when you're falling behind your goal.
Smart Meal Planning
Personalized meal plans built around your current dose phase and side effects. Every meal is GLP-1 optimized — high in protein, gentle on the stomach, and scaled to your reduced appetite.
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Browse 50+ high-protein, GLP-1-friendly recipes filtered by meal type, prep time, and dietary needs. Every recipe includes full nutrition info, step-by-step instructions, and tips for eating with side effects.
Progress Analytics
Beautiful, easy-to-read charts show your weight loss trajectory, weekly nutrition trends, medication responses, and wellbeing scores over time — turning raw data into genuine insights.
AI Meal Scanning
Snap a photo of any meal and get a full nutrition breakdown in seconds — calories, protein, carbs, fat, and fibre. No searching. No manual logging. Just point, snap, and track.
Exercise & Steps
Log walks, workouts, and movement with activity targets that flex with your energy levels. On lower-energy dose days, gentler targets keep you moving without burning out.
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Log your Mounjaro or Wegovy injection in seconds. Track your pen, your dose level, and your injection site — so you always know exactly where you are in your treatment.
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Log your weight, measurements, and how you're feeling after each dose. GLPTrackr turns your data into clear, motivating charts that show you how far you've really come.
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Frequently asked questions.
The dosage of Mounjaro you take is determined by your prescriber or doctor. It is not something to decide independently. They will typically start you at a low dose and review whether to adjust it based on your individual response and tolerability.
Mounjaro (tirzepatide) is available in 2.5 mg, 5 mg, 7.5 mg, 10 mg, 12.5 mg, and 15 mg pre-filled pens. Your prescriber decides which strength is appropriate for you at any given point in your treatment.
Each Mounjaro pre-filled pen delivers a fixed volume — you do not measure it yourself. The exact volume is stated in the patient information leaflet that came with your pen. Your prescriber or pharmacist can also confirm this for your specific strength.
Dose increases are a clinical decision made by your prescriber, not something to initiate yourself. They will review your response and tolerability at follow-up appointments. Any questions about moving to a higher strength should be directed to them.
GLP Trackr lets you log each injection — dose strength, date, and time — and sends weekly reminders so you never miss a dose. It does not advise on dosing; that always belongs with your prescriber. Your log can be a useful reference at follow-up appointments.