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Substance-abusing schizophrenics: do they self-medicate?

Santanu Goswami1, Surendra K Mattoo, Debasish Basu

  • 1Drug De-addiction & Treatment Centre, Department of Psychiatry, Postgraduate Institute of Medical Education & Research, Chandigarh 160-012, India.

The American Journal on Addictions
|June 19, 2004
PubMed
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The self-medication hypothesis (SMH) suggests dual-diagnosis schizophrenia patients use substances to manage symptoms. This study found modest evidence supporting SMH for some patients, substances, and symptoms.

Area of Science:

  • Psychiatry
  • Neuroscience
  • Addiction Medicine

Background:

  • The self-medication hypothesis (SMH) proposes substance use in dual diagnosis aims to alleviate psychiatric symptoms.
  • Consensus on the SMH's validity in dual-diagnosis patients remains elusive.
  • Empirical testing is needed to validate the SMH in clinical populations.

Purpose of the Study:

  • To empirically test the self-medication hypothesis in dual-diagnosis schizophrenia (DDS) patients.
  • To compare substance use motivations and perceived effects between DDS and schizophrenia-only (S) patients.
  • To assess the correlation between symptom-oriented reasons for substance use and perceived effects.

Main Methods:

  • The study divided patients into dual-diagnosis schizophrenia (DDS) and schizophrenia-only (S) groups (n=22 each).

Related Experiment Videos

  • Five sub-hypotheses of the SMH were tested.
  • Patients' psychopathology, reasons for substance use, and perceived substance effects were assessed.

    • Main Results:

    • DDS patients reported lower general and specific psychopathology than S patients.
    • DDS patients cited hedonistic reasons and symptom reduction for substance use.
    • Alcohol showed a trend for self-medication use over opioids and cannabis, with significant differences in perceived effects on symptoms.

    Conclusions:

    • The findings provide modest, consistent support for the self-medication hypothesis in specific patient, substance, and symptom contexts.
    • The results suggest a partial "match" between self-reported reasons for substance use and perceived effects.
    • Implications for understanding and treating substance use in dual-diagnosis patients are discussed.