How prescribers decide whether weight loss injections are suitable
Mounjaro and Wegovy are both prescription-only injectable medicines used alongside diet and physical activity as part of a managed weight-loss programme. Because they are prescription-only, a doctor or other authorised prescriber must evaluate you before any prescription is issued — this is a legal requirement in most countries, not just a formality.
What a prescriber typically considers
When you ask your doctor about weight loss injections, they will generally look at factors including your current weight and health profile, any existing medical conditions, other medicines you take, and whether the potential benefits outweigh any risks for you specifically. Suitability is individual; these medicines are not appropriate for everyone, and your prescriber is best placed to make that judgement.
Which medicine might be prescribed
Two injectable medicines are widely used for weight management in adults: semaglutide (Wegovy), a GLP-1 receptor agonist given once weekly, and tirzepatide (Mounjaro), a dual GIP and GLP-1 receptor agonist also given once weekly. Both are supplied as pre-filled pens and are started at a low dose, with any adjustment made by the prescriber over time. Neither is insulin, and neither is a cosmetic shortcut — they work alongside meaningful lifestyle changes and require ongoing clinical supervision.
Access routes vary by country and healthcare system. In some places these medicines may be available through public health programmes; in others, through private prescribers or specialist clinics. How and where you access a prescription depends on where you live and your individual circumstances — your doctor or a registered pharmacy in your country can advise on the pathway that applies to you. For more context on how these medicines are accessed and what affects their availability, see our overview of weight loss injections.
What happens after a prescription is issued
Once prescribed, you will typically receive guidance from your prescriber or pharmacist on how to use the pen device, how to store it, and what to watch for. Injection sites commonly used are the abdomen, upper thigh, or upper arm — and rotating between sites with each weekly dose is generally recommended to support skin health at the injection area. Your prescriber or the patient information leaflet that comes with your medicine is the right source for technique guidance specific to your pen.
average weekly weight change in the first 16 weeks of Mounjaro & Wegovy use*
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Already prescribed? How GLP Trackr helps you stay on track
Once your prescriber has issued a prescription and you begin your injections, keeping a clear record of every dose becomes surprisingly important. It is easy to lose track of which site you last used, whether this week's injection is due, or how you have been feeling since starting.
GLP Trackr's injection-site tracking and rotation feature is built exactly for this. Each time you log a shot, the app records the site you used — abdomen, thigh, or upper arm — and keeps a rotation history so it can suggest your next site automatically. No mental gymnastics each week; just open the app and follow the prompt.
Alongside site tracking, the app's dose logging captures the date, time, and dose strength of every injection in one place, and dose reminders mean a weekly shot is far less likely to slip your mind. If you do miss a dose, you can log that too and bring an accurate record to your next prescriber appointment — any decision about what to do rests with your prescriber, not the app.
If you are curious about what affects the cost of ongoing treatment, our pages on weight loss injection pricing factors and finding value in your weight loss injection programme cover what people commonly want to understand — without quoting figures that change frequently.
Always follow the guidance of your prescriber or doctor throughout your treatment — they know your full history and are the right person to answer questions about your dose, your progress, and any side effects you experience. If anything feels severe, persistent, or worrying, contact your healthcare professional promptly rather than adjusting anything on your own.
Ready to keep a clear log of every injection from day one? GLP Trackr is free to try for 7 days — download it on the App Store or Google Play and let the app handle the rotation tracking while you focus on your journey.
What does glptrackr include?
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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.
Recipe Library
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.
Community Support
Connect with thousands of others navigating the same medication journey. Share milestones, ask questions, find accountability partners, and get support from people who truly understand.
Never Forget a Dose Again.
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.
Watch Your Body Transform, Week by Week.
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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GLPIQ tracks where you are in your injection cycle and adjusts everything around it: lighter meals on nausea days, higher protein when appetite returns, and smarter targets as your medication level shifts.
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GLPIQ learns your personal side effect patterns over time. After a few cycles, it starts warning you the morning before a rough day — and adjusts your meal plan automatically.
Finds Your Golden Dose
GLPIQ analyses every dose you've been on: weight loss rate, side effects, food noise, mood, protein adherence and tells you which dose gave you the best results. No other app does this.
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Frequently asked questions.
Yes, if you meet the clinical criteria. A prescriber or doctor reviews your medical history and health profile to decide whether a prescription weight loss injection such as Mounjaro or Wegovy is appropriate for you. Suitability is individual and the decision rests entirely with your healthcare professional.
Prescribers typically consider your weight, overall health, existing medical conditions, other medicines you take, and whether the benefits are likely to outweigh any risks for you personally. These are prescription-only medicines, so a thorough assessment is required before any prescription is issued.
Not necessarily. These medicines are not suitable for everyone, and each prescriber makes an individual clinical judgement. If your doctor does not prescribe one, they can explain the reasons and discuss what options may be appropriate for your situation.
Mounjaro contains tirzepatide, a dual GIP and GLP-1 receptor agonist, while Wegovy contains semaglutide, a GLP-1 receptor agonist. Both are once-weekly injectable medicines for weight management. Which is right for you is a decision for your prescriber based on your individual circumstances.
GLP Trackr lets you log each injection, including the dose strength, date, time, and site used. The app tracks your rotation history and suggests your next injection site. Dose reminders help ensure you stay on your weekly schedule. It is available free for a 7-day trial on the App Store and Google Play.