Should I use weight loss injections? Here's how to think it through

Step 1 (Ask yourself what you're actually hoping to achieve

Weight loss injections are licenced for adults managing obesity or overweight with a related health condition) not for cosmetic change or a short-term fix. Mounjaro and Wegovy are tools within a broader effort that includes a reduced-calorie diet and more activity. If you're hoping to lose a modest amount of weight quickly for a holiday or event, these medicines are not what the clinical evidence supports, and no responsible prescriber would offer them for that purpose.

The more useful question is whether excess weight is affecting your health. If you have high blood pressure, type 2 diabetes, dyslipidaemia, obstructive sleep apnoea or a cardiovascular condition, treatment with one of these medicines may be clinically appropriate and you're exactly the kind of person the NICE guidance was written for. The overview of weight loss injections in the UK covers the licensed indications in more detail.

Being honest with yourself here makes the consultation more useful. Prescribers are not judging you; they are assessing whether the benefits outweigh the risks for your specific circumstances.

Step 2, Check whether you're likely to meet the eligibility criteria

The private-licence eligibility threshold is a BMI of 30 or above, or 27 or above alongside at least one weight-related condition. Lower BMI thresholds may apply for some ethnic backgrounds under UK guidance. That said, meeting a number on a BMI calculator is a starting point, not a guarantee. A prescriber will look at your full medical history, current medicines, and any contraindications before approving treatment.

Certain situations mean these medicines are not recommended: pregnancy, breastfeeding, or trying to conceive; being under 18; a personal or family history of medullary thyroid carcinoma or multiple endocrine neoplasia type 2; and a history of pancreatitis or certain gastrointestinal conditions. There is a detailed look at who these medicines are not suitable for, which is worth reading before you consult a prescriber.

The NHS BMI calculator at NHS.uk is a good first check if you're unsure where you stand.

Step 3, Understand what treatment actually involves

Both medicines are once-weekly injections you administer yourself, into the abdomen, thigh or upper arm, rotating the site. Treatment starts at the lowest strength, which is 2.5mg for Mounjaro, and is stepped up by your prescriber in roughly four-week intervals as your body adjusts. The early weeks are often the ones where nausea, loose stools or fatigue are most noticeable, these usually ease as your system settles. If they don't, that's a conversation for your prescriber, not a reason to quietly stop.

It's also worth thinking practically. The pen lives in the fridge, and you'll need a sharps container for used needles. Most people develop a quick weekly routine. The question of how long treatment lasts is genuinely important: the evidence suggests that stopping treatment tends to reverse weight loss over time, so this is usually a medium-to-long commitment rather than a course of tablets.

If injections feel daunting, Wegovy is now also available as a once-daily oral tablet. A prescriber can talk through which formulation suits you.

Step 4 (Think about whether the timing is right for you

Starting treatment when life is chaotic) a major stressor, a planned operation, an uncertain routine, is harder than starting when you can build consistent habits alongside it. That is not a reason to put it off indefinitely, but it is worth being realistic. The medicines support appetite control; they do not replace eating well or moving more.

On the cost side, private treatment is not trivial to budget for, and it continues month to month. A breakdown of what private treatment costs in the UK is useful reading before you commit. Some people qualify for NHS treatment through the phased rollout; others find the waiting times or criteria mean private is the practical route right now, and if you're comparing options it's also worth looking at whether generic weight loss injections might suit your circumstances.

If after all of this the answer feels like yes, the next step is a proper clinical consultation. At nume, a GPhC-registered prescriber reads your consultation personally (not software) and responds the same day. If treatment is clinically suitable, your order is dispatched the same day (if placed before 12pm), and arrives in plain packaging the next working day, and for those based in the Channel Islands we also have a dedicated service covering weight loss injections in Guernsey. Speak to our prescribers to find out whether this is the right step for you.