Tardive dyskinesia in a neuroleptic-naive patient with bipolar-I disorder: persistent exacerbation after lithium intoxication

A case of dose-dependent lithium-induced tardive dyskinesia

Tardive dyskinesia (TD) is a serious side effect that manifests itself mainly with choreiform and athetotic movement disorders, and generally occurs in the long term during antipsychotic treatments and is generally irreversible. We report a 67-year-old female patient having a diagnosis of Bipolar Disorder (BD) for 25 years, receiving 1200 mg/day lithium monotherapy for 10 years and in remission. The patient had been showing signs of TD-like syndrome for the last 6 months. Because the patient responded to lithium well and because other treatment options for TD were unsuccessful, the lithium dose was reduced to 600 mg/day and the patient was monitored. Three months after the dose reduction, the patient's remission state continued, and the TD findings regressed. TD mainly due to antipsychotics is known as irreversible. This case suggests that lithium-induced TD may be reversible in a dose-dependent manner.

A blessing in disguise: Resolution of tardive dyskinesia with development of cervical myelitis

Tardive dyskinesia (TD), which is frequently seen in patients treated with dopamine receptor blocking agents, is difficult to manage. We report on a young Chinese man with bipolar disorder who developed TD after haloperidol treatment, involving the trunk, limbs, and orofacial area. TD persisted despite switching to atypical antipsychotic agents and treatment with valproate, benzodiazepines, and tetrabenazine. Resolution only occurred years later when he developed quadriplegia arising from infective myelitis of the cervical cord (C4-5). He had concomitant vertebral osteomyelitis, which was successfully treated with intravenous antibiotics. With intensive rehabilitation, he recovered the use of his limbs, but had no recurrence of TD. We attribute the resolution of orofacial dyskinesias with a cervical lesion to the interconnections between the orofacial area and cervical spine via the trigeminal nucleus (which has fibers descending as far caudally as C6), as well as to resetting of cortical maps.

Mouvements anormaux d’origine médicamenteuse : les syndromes tardifs

Persistent drug-induced movement disorders (tardive syndromes) remain an important clinical problem and consist of a variety of involuntary movements appearing in a patient exposed to a dopamine-blocking agent. The current state of knowledge on this topic is summarised in this article. Clinical aspects (tardive dyskinesia, tardive dystonia and other forms), prevalence, risk factors, prevention and management are discussed.