Acute psychosis and behavioural changes with seizure-like hyperactive psychomotor activity secondary to isotretinoin initiation in a healthy young male: case report.

Introduction and importance: Acute psychosis is a common brief psychiatric emergency period of delusions, hallucinations, disorganized thoughts and/or speech with or without psychomotor elements, which is not commonly induced by isotretinoin therapy. Dermatologists should counsel the patient before starting the treatment with all new, uncommon side effects, especially neuropsychiatric manifestations before starting this medication. Case presentation: A 23-year-old male smoker with a known case of acne vulgaris recently started on isotretinoin for 2 weeks after which he developed abnormal hyperactive psychomotor activity. He was diagnosed with isoteritoin-induced acute psychosis based on clinical findings and exclusion, and valproic acid and olanzapine were initiated. The patient showed significant improvement. Clinical discussion: Acute psychosis is a new, unfamiliar side effect presenting after initiation of isotretinoin therapy in young adults who were previously healthy. The mechanism is not well known but is thought to result from a decrease in the adult's neurogenesis or alterations in exposure of the serotonergic neurotransmitter system. Conclusion: Isotretinoin is commonly used nowadays for treating young adults. Patients and their families should be counselled about all the psychiatric side effects. Antipsychotics and antiepileptics with mood stabilizers may improve the acute status for patients with isotertoin-induced psychosis.