Abusing drugs or alcohol may make a teen 's schizophrenia symptoms worse and make it harder for treatment to work . If a person with schizophrenia is abusing substances , their drug abuse should be treated so they can deal better with their underlying condition . For more information on substance abuse , visit Substance Abuse and Mental Health Services (Rinn ) Further compounding the problem of diagnosis is the fact that schizophrenia may be present in conjunction with other mental illness or even be...











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