What Are Prescription Slimming Injections and How Do They Work?
Prescription weight-management injections like Mounjaro and Wegovy work by acting on appetite-regulating pathways in the body. Mounjaro (tirzepatide) is a dual GIP and GLP-1 receptor agonist, while Wegovy (semaglutide) acts on GLP-1 receptors. Both are supplied as pre-filled pens and are taken once weekly. Many people commonly report increased feelings of fullness and reduced appetite — often described as quietening 'food noise' — alongside slower stomach emptying, an effect that often lessens over time.
Because these are prescription-only medicines, they are not available over the counter. Your prescriber or doctor assesses whether they are appropriate for you, and the dose is adjusted by them over time — it is not something to manage independently.
What People Mean by 'Reviews'
Much of the conversation around slimming injections online reflects the lived experiences of people already taking them — tracking their progress, managing side effects like nausea or fatigue, and adjusting habits around eating and activity. That real-world experience varies considerably from person to person, which is why individual journeys are so worth documenting. For a broader overview of how these medicines are used, see our guide to weight loss injections, or explore slimming injections for more context on what to expect.
Access and Availability
How these medicines are accessed varies by country and healthcare system. In some places they may be available through publicly funded programmes — for example, certain weight-management pathways in the UK — while in others they are obtained privately through a registered prescriber and pharmacy. For information on publicly funded routes, our page on slimming injections on the NHS covers what is generally involved. Always confirm access routes with your own prescriber or a registered pharmacy in your country, as availability changes and differs widely.
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.
AI Meal Tracking. Built for GLP 1 Appetites.
Point your camera at any meal and let our AI do the rest. Breakfast, doses, weight, mood all tracked in seconds.
How GLP Trackr Helps You Stay on Top of Your Injection Routine
Once you are prescribed a once-weekly injection, staying consistent with site rotation and keeping track of each dose quickly becomes a real practical challenge. GLP Trackr's injection-site tracking and rotation feature logs where you last injected — abdomen, thigh, or upper arm — and suggests your next site automatically, so you are never left guessing or repeating the same spot.
Alongside site rotation, the app logs each dose with its date, time, and strength, giving you a clear record to refer back to and share with your prescriber at appointments. Dose reminders help ensure a weekly injection does not slip your mind during a busy week.
If you want to go deeper into tracking the full experience — not just injections but weight, food, mood, and side effects — our guide to the best slimming injections for weight loss explores how tracking the whole picture supports your journey.
If you experience any side effects that feel severe, persistent, or worrying, contact your healthcare professional promptly. GLP Trackr helps you record what you notice so you can have an informed conversation with your prescriber — it is not a substitute for their advice, and any decisions about your treatment belong with them.
Ready to bring your injection routine together in one place? Download GLP Trackr on the App Store or Google Play and start a free 7-day trial — log your next injection site, set a weekly reminder, and let the app handle the rotation tracking for you.
What does glptrackr include?
10+ powerful features. One app. Built specifically for Mounjaro and Wegovy users.
Everything your GLP-1 journey needs. Free to try for 7 days.
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.
You're Not on This Journey Alone.
Connect with thousands of real GLP-1 users sharing their wins, side effect tips, and meal ideas. Get the support of people who truly get it — because they're living it too.
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The Most Advanced GLP-1 Brain Ever Built.
The first AI built exclusively for GLP-1 weight loss. Every insight, every meal plan, every prediction trained on one thing only: helping you get the most out of your medication.
Knows Your Cycle
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.
Predicts Before You Feel It
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.
The most widely prescribed injectable weight-management medicines are Mounjaro (tirzepatide) and Wegovy (semaglutide). Both are prescription-only and taken once weekly. Which, if either, is suitable for you is a decision for your prescriber or doctor based on your individual health.
In some countries, prescription weight-management injections may be available through publicly funded healthcare pathways, subject to eligibility criteria. Availability varies widely by country and system. Your prescriber or doctor is the best person to advise on what is accessible to you locally.
That decision belongs entirely with your prescriber or doctor. They assess your health history, any medicines you already take, and your weight-management goals before recommending any treatment. No app or website can determine suitability — only a qualified healthcare professional can.
GLP Trackr lets you log each injection — recording the date, dose strength, and site (abdomen, thigh, or upper arm). It tracks your rotation history and suggests your next injection site, and sends reminders so you never miss your weekly dose.
Commonly reported side effects include nausea, constipation, diarrhoea, fatigue, and injection-site reactions. These vary between individuals and often ease over time. If any side effect is severe, persistent, or concerns you, contact your healthcare professional promptly rather than adjusting your treatment independently.