Types of Injections Used for Weight Loss: What You Should Know
Several different injectable medicines are associated with weight management, and they work in distinct ways. The most widely prescribed in recent years are GLP-1 receptor agonists — a class that includes tirzepatide (Mounjaro) and semaglutide (Wegovy). These are prescription-only, once-weekly injections that act on appetite-regulating pathways in the body, helping many people experience reduced appetite and a greater sense of fullness. According to the electronic Medicines Compendium, tirzepatide also acts on GIP receptors, making it a dual-action GLP-1 and GIP receptor agonist.
Other injectable names you may have heard
Searches for "injections for weight loss names" often surface a broader list. Some of the names you may encounter include:
- Wegovy (semaglutide) — a weekly GLP-1 injection prescribed for weight management
- Mounjaro (tirzepatide) — a weekly GLP-1 and GIP injection prescribed for weight management
- Saxenda (liraglutide) — a daily GLP-1 injection; an earlier medicine in the same class
- Trulicity (dulaglutide) — a weekly GLP-1 injection primarily prescribed for type 2 diabetes
- Lipotropic injections and vitamin B12 injections — these are not GLP-1 medicines and are not prescription-only in the same way; evidence for their weight-loss effect is limited and they are a separate category entirely
- HCG injections and compound injections — these occupy a different regulatory space; if you have questions about any injection you have been prescribed, your prescriber or doctor is the right person to ask
How do GLP-1 injections for weight loss work?
GLP-1 and GIP receptor agonists mimic naturally occurring hormones that signal fullness to the brain. Many people report reduced "food noise" and smaller appetite. They are typically started at a low dose and adjusted over time — always under the guidance of the prescriber who issued them. These medicines are not suitable for everyone, and suitability is decided by a prescriber based on individual health history.
For a broader overview of how these medicines are used, see our guide to weight loss injections and our page on injections for weight loss.
average weekly weight change in the first 16 weeks of Mounjaro & Wegovy use*
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How GLP Trackr Helps You Stay on Top of Your Injections
One of the most practical challenges with a weekly injectable is keeping track of where you last injected. Rotating your injection site — between areas such as the abdomen, thigh, and upper arm — is generally recommended to help avoid discomfort at any single spot. GLP Trackr's injection-site tracking and rotation feature lets you log each site you use, and the app suggests where to inject next time based on your own history, so rotation becomes automatic rather than something you have to remember manually.
Beyond site rotation, the app logs each dose — including strength and date — so you always have a clear record of where you are in your treatment schedule. Paired with dose reminders, it means a weekly injection is much less likely to slip by unnoticed in a busy week.
If you want to explore more about managing your injections day to day, our pages on managing your weight loss injections and accessing injections for weight loss cover related ground.
GLP Trackr is available free on the App Store and Google Play — give it a try with a 7-day free trial and see how much easier it is to stay consistent when your injection history is always one tap away.
Any questions about your dose, injection technique, or whether your medicine is right for you should always go to your prescriber or doctor — they know your full medical history. If you experience any side effects that feel severe or persistent, contact a healthcare professional promptly. Adverse effects can also be reported to your national pharmacovigilance scheme (such as the UK's Yellow Card scheme) and to the prescriber who manages your care.
What does glptrackr include?
10+ powerful features. One app. Built specifically for Mounjaro and Wegovy users.
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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.
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 phrase commonly refers to injectable prescription medicines — particularly GLP-1 receptor agonists such as tirzepatide (Mounjaro) and semaglutide (Wegovy) — that act on appetite-regulating pathways. They are prescription-only and must be obtained through a prescriber.
GLP-1 medicines like Mounjaro and Wegovy are associated with appetite reduction in many people, but results vary individually. They are most effective alongside diet and lifestyle changes, and suitability is always a decision for your prescriber or doctor based on your health history.
Commonly prescribed options include tirzepatide (Mounjaro) and semaglutide (Wegovy), both weekly injections. Liraglutide (Saxenda) is a daily GLP-1 option. Vitamin B12, lipotropic, and HCG injections are separate categories with different evidence profiles and regulatory statuses.
GLP-1 medicines are prescription-only, meaning a clinician has assessed suitability before prescribing. They carry possible side effects, and ongoing monitoring is recommended. Any concerns about safety or side effects should be discussed promptly with your prescriber or doctor.
GLP Trackr logs each injection — including site, dose strength, and date — and suggests your next rotation site automatically. Dose reminders help you stay on schedule. All data can be reviewed with your prescriber at appointments.