Methods for selecting medications

A method for treating a patient in need thereof with a psychotropic medication in a manner that reduces the patient's risk of hallucination in response to treatment with said psychotropic medication, the method comprising the steps of:

• (a) obtaining or having obtained a biological sample from said patient,
• (b) performing or having performed a genotyping assay on a panel of at least three genes from said biological sample
• (c) identifying said patient as being at increased risk of hallucination in response to treatment with said psychotropic medication if said patient is a poor metabolizer for said psychotropic medication;
• and
• (d) administering to a patient identified as at increased risk of hallucination in response to a psychotropic medication, a medication selected from the group of medications that are acceptable to use with said genotype and medications that may be used with caution with said genotype.