What's the Criteria for Weight Loss Injections?

Because Mounjaro and Wegovy are prescription-only medicines, eligibility is determined on a case-by-case basis by a healthcare professional who knows your full medical background. While criteria can vary depending on where you are in the world and the clinical guidelines used by your prescriber, there are several factors that are commonly considered.

Body mass index (BMI)

A BMI threshold is frequently part of the assessment. Many clinical frameworks reference a BMI of 30 or above, or a lower threshold (often around 27) when a weight-related health condition is also present — but your prescriber will apply the criteria relevant to your situation and location. BMI is one data point among several, not the sole deciding factor.

Weight-related health conditions

The presence of conditions such as type 2 diabetes, high blood pressure, raised cholesterol, or obstructive sleep apnoea can be relevant to eligibility. These are sometimes called "comorbidities" in clinical guidelines, and their presence may mean a prescriber considers treatment appropriate at a lower BMI threshold.

Medical history and suitability

Not everyone is a candidate, regardless of BMI. Prescribers review personal and family medical history — including thyroid conditions, a history of pancreatitis, and any medicines already being taken — before deciding whether a GLP-1 medicine is appropriate. Pregnancy, breastfeeding, or planning to conceive are also clinically significant considerations that a prescriber will discuss with you directly.

Previous attempts at weight management

Some frameworks ask whether other approaches — such as dietary changes and increased physical activity — have been tried first. This varies by setting and prescriber, so it is worth discussing your full history openly.

For a closer look at how criteria are applied in specific healthcare settings, you may find it helpful to read about how weight loss injection criteria work in NHS-style systems or explore what the criteria for weight loss jabs means in practice. For a broader overview of how these medicines work and who they are designed for, visit our guide to weight loss injections.

Once you have been prescribed a weight loss injection and begin your treatment, staying consistent and informed becomes the focus. GLP Trackr is built specifically for people already on Mounjaro or Wegovy, and the injection-site tracking feature is one of the most practical tools available from your very first dose.

Each time you inject, you can log the site — abdomen, thigh, or upper arm — and the app tracks your rotation history automatically, suggesting your next site so you never have to guess or try to remember. Rotating sites is generally recommended to support skin health, and having a clear record makes it simple to follow that advice.

Alongside site tracking, the dose logging feature lets you record each injection with its date, time, and dose strength, giving you a complete picture of your treatment timeline. This record can be genuinely useful when you attend follow-up appointments, because you can show your prescriber exactly what you have taken and when.

GLP Trackr also lets you log side effects and how you feel day to day — helpful when you want to spot patterns or bring specific observations to your next appointment rather than trying to recall everything from memory.

Always follow the guidance of your prescriber or doctor — they know your full history and are the right person to make any decisions about your treatment. If you experience symptoms that feel severe or persistent, contact your healthcare professional promptly rather than waiting for a scheduled appointment.

Ready to track your injections properly from the start? GLP Trackr is free to try for 7 days — download it on the App Store or Google Play and start logging your first dose today.