Ketamine is a legally recognized medical anesthetic and is used in Taiwanese clinical settings under standard medical regulation, but it is a controlled substance and non‑medical possession, diversion or trafficking are criminal offenses. Taiwanese public health communications and legal summaries classify ketamine among substances subject to scheduling and active law‑enforcement monitoring; clinical use (e.g., as an anesthetic) occurs within regulated hospitals and clinics, but use for psychiatric indications is largely delivered off‑label (clinic‑level protocols) rather than via an NHI‑reimbursed, labeled psychedelic medicine program. There is active industry and research interest from Taiwanese companies in ketamine formulations and clinical trials (examples of local companies pursuing ketamine‑based products abroad), but routine national reimbursement for ketamine when used as a psychiatric intervention is not an established, codified NHI benefit—such uses are typically arranged via private clinic billing or research protocols. For regulatory context and public advisories about ketamine as a controlled/club drug and medical agent see Taiwan MOHW materials. [1]MOHW: New psychoactive substances advisory [2]MOHW narcotics/ATS advisories.