Objective: To compare the lifetime consumption patterns of patients with schizophrenia and multiple substance abuse and multiple substance abusers without schizophrenia.Method: Two hundred and thirty in-patients of a specialized rehabilitation facility for young drug abusers were assessed with regard to their lifetime consumption patterns of 16 different classes of psychoactive drugs. While 110 patients had no diagnosis of a schizophrenic disorder, 120 patients had a comorbidity of multiple substance abuse and schizophrenia.Results: Comorbid patients reported a higher lifetime consumption of hallucinogens, whereas multiple substance abusers without schizophrenia showed a higher lifetime consumption rate of cocaine,Conclusion: The differences found in lifetime consumption patterns between comorbid patients and substance abusers without psychotic disorder do not support the so-called self-medication hypothesis. Instead, the differences in lifetime consumption of certain drugs might be a result of lower social competence and standing in schizophrenic patients and lower ability to procure certain illicit drugs.
Lammertink, M., Lohrer, F., Kaiser, R., Hambrecht, M., & Pukrop, R. (2001). Differences in substance abuse patterns: multiple drug abuse alone versus schizophrenia with multiple drug abuse. Acta Psychiatrica Scandinavica, 104(5), 361-366. https://doi.org/10.1034/j.1600-0447.2001.00480.x