How to get the golden dose out of your Mounjaro pen

Step 1, confirm the pen still has a dose left

A Mounjaro KwikPen carries four weekly doses. Each time you inject, the dose counter on the barrel decreases by one: 4, 3, 2, 1. When the counter shows '1', you have one full dose remaining, the golden dose. If the counter reads '0', the pen is empty and should go straight into a sharps container for safe disposal. Before you do anything else, check that number. It sounds obvious, but it is the step most people skip when they are in a hurry, and it is where most confusion about a missing dose begins.

One more thing worth checking: the liquid in the cartridge should be clear and colourless. If it looks cloudy, discoloured or contains particles, do not use that dose. Contact your prescribing team for guidance. Our support team is available seven days a week if you are a nume patient.

Step 2, prepare the pen correctly before injecting

The golden dose injects in exactly the same way as the first three. Remove the pen cap, attach a fresh needle (if your pen uses a separate needle), and prime as directed in the Patient Information Leaflet supplied with your pen, a small droplet confirming the needle is clear. Rotate your injection site (abdomen, thigh or upper arm) away from your previous location; the skin needs time to recover between injections.

Temperature matters here. A pen that has been sitting in the fridge needs a few minutes at room temperature before you use it, injecting cold liquid is more uncomfortable than it needs to be. The exact room-temperature window you have to work within is specified in the Mounjaro SmPC on the eMC; always follow that, not a general estimate. If you have questions about pen technique, our FAQs cover the most common ones.

Step 3, inject the golden dose without losing any

Press the pen firmly against your skin at a 90-degree angle and hold the injection button down fully. This is the step where people sometimes let go too early. Keep the button depressed and hold the pen in place for a full ten seconds before removing it. The liquid is viscous, and the ten-second hold ensures the complete dose has been delivered rather than pooling under the skin and leaking back out when you withdraw the needle.

You may notice only a tiny amount of liquid remains in the cartridge after injecting, this is expected. A small overfill is built into the pen to ensure the labelled dose is delivered in full. Seeing residual liquid does not mean you missed part of your dose. If you want to understand how to get the golden shot from Mounjaro without any of it going to waste, that page goes through the common concerns one by one. For a closer look at how to get the last dose out of a Mounjaro pen, including what to watch for at each stage, that guide walks you through it in detail.

How to get Mounjaro in the UK: the legal route

Mounjaro is a prescription-only medicine. In the UK, the only lawful way to obtain it is through a prescription issued by a qualified prescriber following a clinical assessment of your medical history, weight, and relevant conditions. There is no legal route to purchase it over the counter or from a seller offering it without that assessment process, and the MHRA has warned publicly about fake weight-loss pens sold online, some of which have contained insulin rather than tirzepatide, leading to serious harm.

To verify that any online pharmacy is genuinely registered, search the GPhC register before ordering from anyone. A registered pharmacy will have a GPhC premises number you can check directly. You can also read more about whether Mounjaro can be bought over the counter for a fuller explanation of UK licensing rules.

At nume, the process runs like this: you complete a free consultation online, it is read the same day by a GPhC-registered Independent Prescriber on our clinical team, and if treatment is appropriate, your order is dispatched that afternoon (for orders before 12pm, Monday to Friday). If you are already on Mounjaro and looking to continue or move to your next dose, starting a consultation with us takes a few minutes. Clinical eligibility for Mounjaro in the UK covers adults with a BMI of 30 or above, or 27 or above alongside a weight-related condition such as high blood pressure, high cholesterol, or type 2 diabetes, though a BMI figure is never the whole story, which is exactly why a prescriber reviews every case individually. You can explore the full treatment options on the weight-loss treatments page, or read a broader overview of how Mounjaro works on the Mounjaro information page.

If you have been wondering whether it is possible to stretch a pen further, the pages on getting five doses from a pen and on extra doses address those questions directly. The short answer: the pen is labelled for four doses, and if you are specifically trying to understand how to get the golden dose from Mounjaro without a syringe, your prescriber's guidance takes precedence over any workaround.