Is Ketamine Legal in Australia? A Complete Guide to Prescription, Therapy, and Penalties
Ketamine is legal in Australia, but its status is strictly controlled as a Schedule 8 (S8) prescription-only medicine. It is not available over the counter. While it has legitimate medical uses for anaesthesia and, more recently, treatment-resistant depression, possessing it without a valid prescription is a criminal offence. Consequently, understanding the distinction between legal medical access and illegal possession is essential.
The Medical Status: TGA-Approved Uses
Ketamine’s legal medical role in Australia is defined by the Therapeutic Goods Administration (TGA).
TGA-Approved Use: The TGA has approved ketamine as an anaesthetic drug for human therapeutic use. More recently, it has approved esketamine nasal spray (Spravato) specifically for the treatment of treatment-resistant depression (TRD) in adults . This is the only ketamine product formally approved for a mental health indication in Australia .
Off-Label Use: Generic ketamine (often used intravenously or subcutaneously) is only TGA-approved as an anaesthetic. However, medical practitioners can legally prescribe it “off-label” for depression if they believe it is clinically appropriate . This practice is subject to strict state-based regulations.
How to Access Ketamine Legally for Depression
Accessing ketamine for depression is not as simple as getting a prescription from a GP. It requires a structured, supervised clinical process.
Who Can Prescribe It: For treatment-resistant depression, only AHPRA-registered psychiatrists can prescribe esketamine or ketamine. All other prescribers must refer the patient to a psychiatrist .
State-Based Approval Requirements: State health departments impose additional requirements. For example, in New South Wales, psychiatrists must obtain an approval from the NSW Ministry of Health to prescribe esketamine or ketamine for TRD under certain circumstances, such as for a drug-dependent person or for continuous treatment exceeding two months . In Tasmania, psychiatrists must seek authorisation under Section 59E of the Poisons Act 1971, which involves review by a Ketamine Advisory Panel .
Administration Under Medical Supervision: Esketamine and ketamine for depression must be administered under direct medical supervision in a healthcare setting with established monitoring procedures . Patients cannot take the medication home. They are typically monitored for two hours after each dose due to potential side effects like sedation, dissociation, and blood pressure changes .
The Cost of Ketamine Therapy
The financial cost varies significantly depending on the type of ketamine and the setting.
Esketamine (Spravato) : As of May 1, 2025, esketamine nasal spray is subsidised on the Pharmaceutical Benefits Scheme (PBS) for TRD. This reduces the cost of the medication itself to $31.60 per dose (or $7.70 for concession card holders) . Before the PBS listing, a single dose could cost around $800 .
The “Hidden” Costs: The PBS subsidy only covers the medication. The administration and supervision fees are not covered by Medicare or typically by private health insurance . These out-of-pocket costs can be substantial. For instance, Epworth Clinic charges a $340 procedure fee per session . Professor Colleen Loo notes that treatment sessions cost patients around $300-$400 per session, and this aspect is not covered by the PBS .
Generic Ketamine (Off-Label) : Generic ketamine used off-label is much cheaper per dose, often costing around $10 . However, the associated clinical supervision fees would still apply, and this option is less likely to receive insurance or government subsidies for the procedure itself.
Legal Penalties for Unauthorised Possession
Ketamine’s status as a Schedule 8 controlled substance means that possessing it without a valid prescription is a serious criminal offence.
The penalties for unauthorised possession vary by state and territory. In the Northern Territory, there is a separate offence for possession of a less than traffickable quantity of drugs in a public place, which can attract up to 5 years imprisonment for certain drugs including ketamine . In one Northern Territory Supreme Court case, a quantity of 0.63 grams of ketamine was described as “six times over the legislated threshold” for a commercial quantity, with a maximum penalty of 25 years imprisonment .
While maximum penalties for simple possession are severe on paper, in practice, courts often impose lesser sentences. Across most Australian jurisdictions, penalties for possession can include fines, good behaviour bonds, or imprisonment, depending on the circumstances and the individual’s prior record .
The Rising Trend of Recreational Use
Despite its legal restrictions, recreational ketamine use is increasing across Australia. A nationwide wastewater study led by Adelaide University found that ketamine mass loads increased from 2022 to 2025, particularly in higher socioeconomic areas. The study noted “substantially elevated excretion on weekends, suggesting an increase in recreational, or non-medical use” .
National data supports this trend. The proportion of Australians who have ever used ketamine rose from 1.9% in 2016 to 4.3% in 2023 . This growing recreational use exists in stark contrast to the tightly controlled medical framework.
Summary
Ketamine is legal in Australia, but only as a Schedule 8 prescription medicine. It is approved for anaesthesia and, in its esketamine form, for treatment-resistant depression. Access for depression requires a psychiatrist, state-based approvals in some cases, and administration under direct medical supervision. While the medication cost for esketamine has become more affordable through the PBS, the significant out-of-pocket fees for supervised treatment sessions remain a major barrier. Possessing ketamine without a valid prescription is a criminal offence with penalties ranging from fines to imprisonment, depending on the jurisdiction and quantity.