The phrase prescription only medicine sounds like paperwork. In cosmetic treatment it is the load bearing legal category, and almost everything that distinguishes a properly run injectable service from a poorly run one flows from it.
What the classification means
Medicines in the UK are classified under the Human Medicines Regulations 2012. A prescription only medicine may be sold or supplied only in accordance with a prescription given by an appropriate practitioner. The prescription is for a named individual patient. It is not a licence to hold stock for whoever turns up.
Botulinum toxin products licensed in the UK are prescription only medicines. So are local anaesthetics in injectable form, and a range of other products used in this sector, including hyaluronidase, the enzyme used to dissolve hyaluronic acid filler.
The last of those has a consequence people rarely anticipate. A practitioner who is not a prescriber cannot simply keep hyaluronidase on the shelf for emergencies. They need a prescribing arrangement that makes it available when it is needed, which is why the question about hyaluronidase in our question set has three parts rather than one.
Who may prescribe
Prescribing rights in the UK belong to defined groups: doctors, dentists, and certain non medical prescribers including nurse independent prescribers, pharmacist independent prescribers and others who have completed an approved prescribing qualification and have it annotated on their register entry. That annotation is public. You can see on the NMC or GPhC register whether a person is recorded as an independent prescriber.
A person who is not a prescriber may still lawfully administer a prescription only medicine in appropriate circumstances, for example where it has been prescribed for a named patient by a prescriber and is administered in accordance with the prescriber's directions. This is the mechanism by which non prescribing injectors operate, and it is lawful. What matters is whether the prescriber genuinely assessed you, which is a separate question covered in our guide to remote prescribing.
What you are entitled to at this stage
- To be assessed by a prescriber before a prescription only medicine is prescribed for you.
- To be told the name of the product being used and to see its packaging.
- To have the product name and batch number recorded in your notes.
- To be told when a medicine is being used off label and why.
- To report a suspected adverse reaction yourself through the MHRA Yellow Card scheme.
Prescription only medicines may not lawfully be advertised to the public in the UK, including by naming the brand.
Why nobody may advertise it to you
UK medicines law prohibits advertising prescription only medicines to the general public. This applies to the brand names of botulinum toxin products. It is why compliant clinics advertise anti wrinkle injections or wrinkle relaxing treatment rather than naming the product, and it is why the Advertising Standards Authority has ruled repeatedly against marketing that names these products.
Read that carefully, because it inverts an intuition. A clinic that names the brand loudly across its website and social media is not being more transparent than its competitors. It is more likely to be breaching a medicines advertising rule. The transparency you want is not in the advertising, it is in the consultation, where naming the exact product you will receive is entirely appropriate and should happen.
Prescription only medicines offered at a discount, in a package, at an event, or through a social media promotion. Any of these suggests the medicine is being supplied on a commercial trigger rather than on an individual clinical assessment.
Where the product should come from
Prescription only medicines should reach a clinic through the lawful supply chain: a licensed wholesaler or a registered pharmacy, dispensed against a prescription for a named patient. There is a real market in products obtained outside that chain, including unlicensed imports and products bought online, and it exists because the lawful route is slower and more expensive.
You are entitled to ask where the product came from, to see the box, and to have the product name and batch number recorded in your notes. This is not an exotic request. It is the same information the MHRA asks for if an adverse incident is reported through the Yellow Card scheme.
Off label use, which is lawful and should be explained
A medicine is licensed for specific indications. Using it outside those indications is off label use. It is lawful, it is common across medicine generally, and in aesthetics it is routine, because many of the areas treated with botulinum toxin are not within the licensed indications of the product used.
Off label use is not a scandal. What matters is that the prescriber is satisfied it is appropriate, that the reasoning is recorded, and that you are told. Professional guidance expects prescribers to explain when they are prescribing off label and why, particularly where the evidence base is thinner. A clinic that has never mentioned the concept has probably not had the conversation with you that it should have.
Fillers are a different regime entirely
Most dermal fillers used in the UK are not medicines. They are regulated as medical devices, which historically has meant a conformity assessment route rather than the marketing authorisation process a medicine goes through. The practical result is that filler can be bought by anyone, needs no prescription, and is not subject to the advertising prohibition. This is one of the strangest asymmetries in the sector: the product that cannot be reversed is the one with the lighter regime. We set that out in why fillers are not medicines.
What this means practically
Before any treatment involving a prescription only medicine, you should be able to answer four things: who prescribed it, whether they assessed you and how, what the product is, and where it came from. If any of the four is unavailable, something in the chain is not working as it should, and the chain exists to protect you rather than to create paperwork.
None of this requires you to be confrontational. Asking who is prescribing is an ordinary question, and in a well run service the answer is immediate, because the prescriber is usually standing in front of you.