Semaglutide 5mg/ml dosage chart: reading the concentration on your Wegovy pen

You've found a chart showing semaglutide at 5mg/ml — here's where that figure comes from

Picture the situation: you're researching Wegovy, you've come across a dosage chart labelled "semaglutide 5mg/ml", and you're trying to work out whether it applies to the pen sitting in your fridge, or the one you're considering asking about. It's a reasonable question, and a surprisingly common source of confusion.

The 5mg/ml concentration notation belongs to vial-based or compounded semaglutide formats, where the medicine is supplied as a liquid that must be drawn up with a syringe and measured in volume. In that context, knowing the concentration lets you calculate that, say, 0.5ml of a 5mg/ml solution delivers 2.5mg of semaglutide. These formats exist in some markets and in compounding pharmacy contexts, but they are not part of the UK-licensed Wegovy product.

What a UK patient receives through a legitimate, regulated pharmacy is a pre-filled pen. Each pen contains multiple weekly doses at a single fixed strength (0.25mg, 0.5mg, 1.0mg, 1.7mg or 2.4mg) already loaded. There is no volume to measure, no syringe to fill. The dose is pre-set. A full semaglutide dosage chart for Wegovy maps those fixed-strength pens across the titration schedule, which is a rather different document to a concentration-based one. You can also explore the broader range of licensed Wegovy doses to see how each strength fits into the clinical picture.

For anyone who has received a concentration-based chart alongside a vial rather than a pre-filled pen, that is worth discussing with a prescriber urgently. It is also worth verifying that the product came from a pharmacy listed on the GPhC register, which is searchable at pharmacyregulation.org.

How the licensed UK titration schedule actually works

The semaglutide dosage chart that applies to licensed Wegovy in the UK is a stepped one. Treatment begins at 0.25mg once weekly, a starting dose whose job is to help your body adjust to the medicine gradually, not to produce significant weight loss from the outset. After approximately four weeks, a prescriber typically moves the dose upward, through 0.5mg, then 1.0mg, then 1.7mg, arriving at the 2.4mg maintenance dose around week sixteen to twenty of treatment.

Since January 2026, a 7.2mg maintenance dose has also been licensed in the UK, following MHRA approval. The Wegovy treatment overview explains both pathways. The 7.2mg option is delivered via a dedicated single-dose pen approved in April 2026, and it is available to adults with a BMI of 30 or above, though whether it is the right maintenance target for any individual is always a clinical decision, not an automatic next step.

Each dose step happens at your prescriber's direction, based on how well the previous dose was tolerated and how treatment is progressing. For most people, the main signals are gastrointestinal: nausea, loose stools or constipation are common early on and generally ease as the body adapts. If side effects at a given dose are significant, a prescriber may hold the titration rather than push upward on schedule. The NHS semaglutide medicines page lists the full side-effect profile in accessible language.

None of this is something to navigate alone. The titration pace, the decision about when to increase, and how to handle a missed dose all belong in a conversation with the clinician overseeing your care, never in a dosage chart interpreted without that context.

The safety gap between a concentration chart and a pre-filled pen

The reason this distinction matters goes beyond semantics. A concentration-based dosage chart requires the user to do arithmetic: converting milligrams per millilitre into the volume to inject. Any arithmetic error produces the wrong dose. Pre-filled licensed pens remove that step entirely, the correct amount is already there, click-counted, nothing to measure.

The MHRA has been clear about the risks attached to semaglutide and other GLP-1 medicines obtained outside the licensed supply chain. Fake and unlicensed pens have been seized in large quantities across the UK in recent years, and some have contained entirely different substances. If you're at the point of looking up a concentration-based semaglutide chart because you've been offered a vial-based product, the MHRA's Yellow Card scheme lets you report suspect products and sellers online, anonymously if you prefer.

For reference on the 10mg/ml concentration format that appears in other dosage charts circulating online, you can find a detailed breakdown in the 10 mg semaglutide dosage chart that addresses that format separately. If the vial-based format you've encountered is specifically a 5mg in 2ml presentation, the semaglutide 5mg 2ml dosage chart covers how that concentration and volume combination is typically used, which is useful context for understanding why it differs so fundamentally from a pre-filled pen. The semaglutide 5mg pen dosage guide covers how specific Wegovy pen strengths translate into the titration schedule for those already on licensed treatment.

Ultimately, if a document or a seller is asking you to calculate volumes and draw up your own injections, that warrants a very careful look at where the product came from. Licensed Wegovy in the UK does not work that way.

Getting started on licensed Wegovy through a regulated UK service

The plain version: if you want to start semaglutide for weight management in the UK, the only route that the law provides is a prescription following a clinical assessment. There is no shortcut around that, and a concentration-based chart isn't one either.

At nume, a GPhC-registered Independent Prescriber reads every consultation personally on the day it's submitted, your answers go to a real clinician, not an automated system. If treatment is clinically suitable, a pre-filled Wegovy pen is dispensed from our own GPhC-registered pharmacy (premises number 9012878, verifiable at pharmacyregulation.org) and sent by DPD the same day, arriving in plain, unbranded packaging the next working day. You can check the tracking on your phone while the box is still in transit.

Pricing is one transparent figure that covers the consultation, prescription, the medicine itself and delivery. For an overview of what treatment involves and what it costs, the weight-loss treatments page is the right place to look. If you're still researching whether semaglutide or tirzepatide makes more sense for your situation, the weight-loss overview sets out both options clearly.

Questions about eligibility, current medication, or anything else in your health history are exactly what the free consultation is for. Our clinical team is there to give you a considered answer, not a rubber stamp. When you're ready, starting is straightforward.