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Rapid cyclers and antidepressants

L Tondo, P Laddomada, G Serra

    International Pharmacopsychiatry
    |January 1, 1981
    PubMed
    Summary
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    Antidepressant use may trigger rapid cycling in some bipolar disorder patients, particularly women. This shift to rapid cycling bipolar disorder is linked to latent hypomania becoming clinically apparent under drug influence.

    Area of Science:

    • Psychiatry
    • Clinical Psychology
    • Pharmacology

    Background:

    • Bipolar disorder (manic-depressive illness) is a chronic mental health condition characterized by mood swings.
    • Longitudinal studies are crucial for understanding the evolving course of bipolar disorder over time.
    • The impact of antidepressant pharmacotherapy on the long-term trajectory of bipolar disorder requires further investigation.

    Purpose of the Study:

    • To investigate the longitudinal course of bipolar disorder in a cohort of patients.
    • To identify factors associated with changes in disease trajectory, specifically the development of rapid cycling.
    • To examine the potential role of antidepressant drugs in precipitating rapid cycling bipolar disorder.

    Main Methods:

    • Longitudinal follow-up of 434 patients diagnosed with bipolar disorder.

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  • Analysis of disease course changes, including the onset of rapid cycling (≥2 cycles/year).
  • Retrospective review of antidepressant exposure and its temporal relationship to changes in illness course.

    • Main Results:

    • Of 434 patients, 67 developed rapid cycling.
    • Antidepressant drug use preceded the onset of rapid cycling in 40 of these patients.
    • Patients developing rapid cycling under antidepressants often exhibited latent hypomanic episodes that became manifest, particularly middle-aged women.

    Conclusions:

    • Antidepressant treatment may unmask or intensify latent hypomania, leading to rapid cycling bipolar disorder in susceptible individuals.
    • The development of rapid cycling appears linked to an interaction between antidepressant pharmacotherapy and underlying hypomanic tendencies.
    • Clinicians should exercise caution when prescribing antidepressants to bipolar disorder patients, especially those with energetic temperaments or a history suggestive of hypomania.