Ketamine remains a Class B controlled drug in the UK. Unauthorised possession can carry a maximum penalty of up to five years in prison, while supply or production can carry up to fourteen years. Ketamine can still be lawfully prescribed and used in healthcare because it is also a Schedule 2 controlled drug, but medical use, professional possession, importing, exporting and travelling with prescribed ketamine are all subject to specific legal controls.
Ketamine Law in the UK
Ketamine is legal to use in medicine in the UK, but it is also a controlled drug. That means possession, supply, production and import or export are regulated by law, and the legal position depends heavily on whether the ketamine is being handled under legitimate medical or licensed circumstances.
As of September 2026, ketamine remains a Class B controlled drug under the Misuse of Drugs Act 1971. It is also listed in Schedule 2 of the Misuse of Drugs Regulations 2001 for England, Wales and Scotland, which allows legitimate medical use while imposing tighter controls on prescribing, possession, supply and handling.
The distinction matters because saying “ketamine is legal in the UK” is too broad. Medical use can be lawful. Possessing or supplying ketamine outside the permitted legal framework can be a criminal offence.
The Advisory Council on the Misuse of Drugs reviewed ketamine again in 2025–26 and recommended that it remain in Class B rather than being moved to Class A. The government published that recommendation in January 2026. See the ACMD classification announcement.
Ketamine law at a glance
| Issue | Current UK position |
|---|---|
| Drug classification | Class B under the Misuse of Drugs Act 1971 |
| Controlled-drug schedule | Schedule 2 under the Misuse of Drugs Regulations 2001 in England, Wales and Scotland |
| Possession without lawful authority | Criminal offence |
| Maximum possession penalty | Up to 5 years in prison, an unlimited fine, or both |
| Supply or production | Criminal offence without lawful authority |
| Maximum supply or production penalty | Up to 14 years in prison, an unlimited fine, or both |
| Prescription medical use | Permitted within the controlled-drug framework |
| Import or export | Controlled and may require Home Office licensing |
What class of drug is ketamine in the UK?
Ketamine is a Class B controlled drug.
The current Home Office controlled drugs list identifies ketamine as Class B under the Misuse of Drugs Act and Schedule 2 under the Misuse of Drugs Regulations.
The two classifications perform different jobs. The Class A, B or C system mainly determines the criminal-law framework and maximum penalties. The Schedule 1–5 system governs legitimate access to controlled drugs, including medical use, prescribing, storage, record-keeping and supply.
This is why a drug can be both tightly controlled and legitimately used in medicine at the same time.
Why is ketamine Class B rather than Class A?
Ketamine was reclassified from Class C to Class B in 2014 after the Advisory Council on the Misuse of Drugs reviewed increasing evidence of harm, particularly urinary and bladder damage associated with repeated use.
The government later rescheduled ketamine as a Schedule 2 controlled drug so that legitimate healthcare use could continue within a stricter regulatory framework.
In 2025, the government asked the ACMD to review the classification again. After examining current evidence, the Council advised in January 2026 that ketamine should remain Class B rather than move to Class A.
The ACMD’s recommendation was based on its updated assessment of prevalence, dependence, urinary harm, hepatobiliary complications and other risks. Its review also recommended additional public-health and policing measures rather than relying on reclassification alone.
You can read the 2026 ACMD review of ketamine use and harms.
Is it illegal to possess ketamine in the UK?
Possessing ketamine without lawful authority can be a criminal offence.
There are lawful situations in which a person or organisation may possess ketamine, such as prescribed medical use or licensed professional activity. The fact that ketamine has legitimate medical uses does not create a general right to possess it.
According to GOV.UK drug penalty guidance, the maximum penalty for possession of a Class B drug is up to 5 years in prison, an unlimited fine, or both.
That is the maximum available penalty, not an automatic sentence in every case. Actual outcomes depend on the circumstances and the way an offence is dealt with.
What is the law on supplying ketamine?
Supplying ketamine without lawful authority is a serious criminal offence.
“Supply” is broader than a commercial sale. The law can apply when a controlled drug is given, shared or otherwise supplied to another person, even where money does not change hands.
GOV.UK states that the maximum penalty for supplying or producing a Class B drug is up to 14 years in prison, an unlimited fine, or both.
This is why phrases such as “I wasn’t selling it” do not automatically mean there is no supply offence. The legal issue is wider than whether the person made a profit.
What about possession with intent to supply?
Possession with intent to supply is treated differently from simple possession because it concerns an intention to provide the drug to another person.
Whether an allegation amounts to simple possession or possession with intent to supply depends on the evidence and circumstances of the case. Quantity can be relevant, but it is not the only factor.
This page is intended to explain the general legal framework rather than predict the outcome of individual cases. Anyone facing an investigation or criminal charge should obtain advice from a solicitor who can assess the actual evidence.
Is medical ketamine legal in the UK?
Yes. Ketamine has legitimate medical uses and can lawfully be prescribed, supplied and administered within the controlled-drug framework.
Ketamine is a Schedule 2 controlled drug, which reflects the fact that it has recognised medicinal value while still requiring tighter controls than ordinary prescription medicines.
The Home Office explains that the Schedule assigned to a controlled drug affects lawful access, including rules around possession, supply, administration, prescribing, record-keeping, labelling, safe custody and disposal.
For the clinical side of the subject, see Medical Ketamine: Treatment, Uses and UK Access.
Can ketamine be prescribed?
Ketamine can be prescribed and used in legitimate healthcare, subject to controlled-drug rules and professional prescribing requirements.
Its established licensed uses include anaesthesia, while other uses may be off-label depending on the clinical context. The legal status of a medicine and the question of whether a particular use is licensed are separate issues.
A medicine can therefore be lawfully prescribed even where the specific clinical use is off-label, provided the prescriber is acting within the appropriate professional and legal framework.
That does not mean a person can lawfully obtain ketamine from any source simply because the same substance is used in medicine.
Can healthcare professionals legally possess ketamine?
Yes, where the relevant legal conditions are met.
Controlled-drug regulations create lawful routes for healthcare professionals and organisations to possess, prescribe, supply or administer controlled medicines.
For example, Home Office regulations introduced in 2023 specifically clarified lawful possession of ketamine by healthcare professionals acting under patient group directions, including paramedics, in specified circumstances.
This illustrates why context matters. Possession by an authorised healthcare professional acting within a legal framework is not treated in the same way as unauthorised possession.
Can businesses or organisations possess ketamine?
Businesses and organisations dealing with controlled drugs may require Home Office licensing.
The Home Office states that organisations that possess, manufacture, produce or supply controlled drugs in England, Wales or Scotland generally need an appropriate domestic controlled-drug licence unless a specific exemption applies.
Licensing requirements are detailed and depend on what the organisation is doing, where the drugs are held and which legal exemptions apply.
See the Home Office guidance on controlled-drug domestic licences for the current framework.
Is it legal to buy ketamine online in the UK?
The fact that a transaction takes place online does not change the legal status of ketamine.
If a person acquires ketamine without lawful authority, the legal issues around possession and supply still apply. An online seller being based outside the UK does not automatically make the transaction lawful.
There may also be additional issues around importation if a controlled drug is being sent into the country.
This is why our Buy Ketamine Online UK: Risks, Legality and What to Know page focuses on legal and safety considerations rather than directing readers to sellers.
Can ketamine be imported into the UK?
Controlled-drug imports are regulated.
The Home Office states that companies and organisations intending to import or export controlled drugs generally need the appropriate controlled-drug licence. See the Home Office guidance on controlled-drug import and export licences.
Importing a medicine can also involve separate medicines regulation through the MHRA, particularly where the product is licensed or unlicensed. If a medicine contains a controlled substance, the MHRA advises importers to contact the Home Office as well.
This is a regulated process. Ordering a controlled substance from abroad is not the same thing as using the formal import route available to authorised businesses or healthcare organisations.
Can controlled ketamine medicine be posted to someone from overseas?
The rules for personal medicines are restrictive.
Home Office guidance states that controlled-drug medicines should not simply be posted from overseas to a person in the UK. Where further supplies are needed, the guidance says they should be obtained through the appropriate healthcare and pharmaceutical channels.
This is particularly relevant to people receiving treatment abroad who later want medication sent to them in the UK.
Can you travel with prescribed ketamine?
People travelling with legitimately prescribed controlled-drug medicine need to follow specific rules.
GOV.UK advises travellers to carry proof that the medicine was prescribed to them, usually through a prescription or letter from the prescribing clinician. Controlled-drug medicines should be carried with the traveller rather than treated as ordinary unrestricted medication.
For visitors entering the UK, the Home Office’s personal import policy can allow up to a 3-month supply of Schedule 2–4 Part I medicines that have been lawfully prescribed in the traveller’s country of habitual residence, subject to the conditions in the guidance.
See Home Office guidance on travelling with medicine containing controlled drugs.
What proof should someone carry when travelling with prescribed ketamine?
Home Office guidance recommends carrying a letter from the prescribing clinician.
The letter should normally identify the patient and medicine and include relevant information such as dose, strength, frequency, quantity and the prescriber’s professional details.
Travellers should also check the rules of the country they are entering because another country may apply restrictions that differ from UK law.
GOV.UK warns that carrying a medicine legally prescribed in the UK does not guarantee that the same medicine can legally be brought into another country.
Does prescription ketamine make possession automatically lawful everywhere?
No. A UK prescription does not override the controlled-drug laws of another country.
People travelling abroad should check the destination country’s rules before travelling, preferably through the relevant embassy or official authority.
This is particularly important with controlled drugs because some countries apply much stricter import restrictions than the UK.
Does the law distinguish between liquid, powder and crystal ketamine?
The legal classification does not depend on whether ketamine is described as liquid, powder, crystal, rock or another informal term.
Terms based on appearance do not create separate legal categories.
Ketamine hydrochloride, liquid pharmaceutical preparations and material sold under informal descriptions remain subject to controlled-drug law where the substance falls within the relevant legal definition.
For the terminology itself, see Forms of Ketamine: Powder, Crystal, Liquid, Salt and Other Terms Explained.
Does purity change the legal status?
Claims about purity do not make unauthorised possession lawful.
A substance described as “medical grade”, “pharmaceutical grade” or “99% pure” does not gain a different legal status simply because of the wording used to advertise it.
Those descriptions also do not establish that the material is genuinely pharmaceutical or that its composition has been independently verified.
What changed in the 2026 ketamine review?
The key point is that the ACMD did not recommend moving ketamine from Class B to Class A.
Its January 2026 review concluded that ketamine and the relevant controlled analogues should remain Class B, while recommending additional measures around prevention, identification of harms, treatment, policing and public-health response.
The Council’s recommendation was a majority decision rather than a unanimous one, which is also recorded in the published review.
The current legal classification therefore remains Class B.
Class B and Schedule 2: why both matter
| Classification | What it mainly controls |
|---|---|
| Class B | Criminal offences and maximum penalties under the Misuse of Drugs Act 1971 |
| Schedule 2 | Legitimate access and controls around prescribing, possession, supply, administration, record-keeping and handling |
These systems are related but should not be treated as interchangeable.
The Class tells you where ketamine sits within the criminal-law framework. The Schedule helps determine how legitimate medical and professional access is regulated.
Does the same law apply across the whole UK?
The Misuse of Drugs Act 1971 provides the central UK controlled-drug framework, but some regulations and administrative arrangements differ between Great Britain and Northern Ireland.
The Misuse of Drugs Regulations 2001 referred to throughout this page apply to England, Wales and Scotland. Northern Ireland has its own corresponding controlled-drug regulations.
For that reason, people dealing with a specific professional, licensing or prescribing question in Northern Ireland should check the current Northern Ireland rules rather than assuming every procedural detail is identical.
What should someone do if they are facing a ketamine-related criminal charge?
General online information cannot determine what will happen in an individual case.
The circumstances can include issues such as possession, alleged supply, importation, quantity, evidence of intent, previous convictions and other facts that cannot be assessed from a general guide.
Anyone who has been arrested, interviewed under caution or charged with a controlled-drug offence should obtain advice from a qualified criminal defence solicitor.
The maximum penalties listed on GOV.UK explain the legal ceiling. They do not predict the sentence or outcome in an individual case.
What is the most important point about UK ketamine law?
Ketamine’s medical use does not remove its controlled-drug status.
A hospital, clinician or licensed organisation may lawfully possess and use ketamine within the appropriate framework, while the same substance can give rise to criminal offences when possessed, supplied or imported without lawful authority.
That is the central distinction to keep in mind when reading claims that ketamine is either simply “legal” or simply “illegal” in the UK.
References
- Home Office: List of controlled drugs under UK misuse of drugs legislation
- GOV.UK: Penalties for drug possession, supply and production
- ACMD: Decision on the classification of ketamine, January 2026
- ACMD: Ketamine – an updated review of use and harms
- Home Office: Controlled-drug domestic licences
- Home Office: Controlled-drug import and export licences
- Home Office: Travelling with medicine containing controlled drugs
- GOV.UK: Taking medicine in or out of the UK
Legal information checked: September 2026. This page provides general information about UK controlled-drug law and is not individual legal advice.
Evidence last checked: 18 September 2026
