We wish to report the case of a patient who developed temporomandibular joint dislocation due to dystonia following a single dose of aripiprazole. Our patient was a 23-year-old woman presenting with persistent low mood, fatiguability, insomnia and suicidal ideation.There was no past history of psychiatric morbidity. There was family history of depressive episode and deliberate self harm in her husband who was her paternal cousin. She was given 10mg escitalopram and 0.5 mg clonazepam for insomnia on a diagnosis of a moderate depressive episode and improved over the next 3 weeks. However she developed irritability and agitation while on the above medications for which she was given a single dose of aripiprazole lOmg at night by another psychiatrist not attached to our institution, which was not appropriate for her condition. The patient had taken 10mg escitalopram in the morning.
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