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Summary
Family history may influence tardive dyskinesia risk. This study found that among patients on long-term neuroleptics, those with relatives also on these drugs and with psychiatric disorders showed similar tardive dyskinesia presence or absence.
Area of Science:
- Neuroscience
- Psychiatry
- Genetics
Background:
- Long-term neuroleptic treatment is common for psychiatric disorders.
- Tardive dyskinesia (TD) is a potential side effect of neuroleptic medications.
- The genetic or familial contribution to TD risk is not fully understood.
Purpose of the Study:
- To investigate the potential familial link in the development of tardive dyskinesia.
- To explore if family history of psychiatric disorders and neuroleptic use correlates with TD concordance.
Main Methods:
- Survey of 500 inpatients undergoing long-term neuroleptic therapy.
- Identification of patients with first-degree relatives also on long-term neuroleptics and with psychiatric disorders.
- Assessment of tardive dyskinesia concordance within identified patient-relative pairs.
Main Results:
- Eight patient-relative pairs met the inclusion criteria.
- These 8 pairs demonstrated concordance for the presence or absence of tardive dyskinesia.
- This suggests a potential shared genetic or environmental influence.
Conclusions:
- Familial factors may play a role in the susceptibility to tardive dyskinesia.
- Further research is warranted to elucidate the specific genetic and environmental mechanisms.
- Understanding familial risk could inform preventative strategies for neuroleptic-induced movement disorders.