title: Hallucinations during morphine but not during oxycodone treatment.
mesh_terms: D000328:Adult; D003061:Codeine / Q000031:analogs & derivatives*; D006212:Hallucinations / Q000139:chemically induced*; D006801:Humans; D009020:Morphine / Q000009:adverse effects*; D010098:Oxycodone / Q000627:therapeutic use*
chemical_list: D009020:Morphine; D010098:Oxycodone; D003061:Codeine