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To describe the potential for interaction between opioids and serotonergic antidepressants leading to the development of serotonin syndrome (SS), mechanism of the interaction, and the spectrum of SS in elderly residents of a long-term care facility.
 ( adverse event: leading ,  elderly residents: Subject, elderly: Subject.Age, serotonin syndrome: Effect, opioids: Treatment, serotonergic antidepressants: Treatment, opioids: Treatment.Drug, serotonergic antidepressants: Treatment.Drug, opioids: Combination.Drug, serotonergic antidepressants: Combination.Drug) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: adverse event,potential therapeutic event, Arguments type: Treatment.Disorder,Treatment.Time_elapsed,Treatment.Dosage,Subject.Race,Treatment.Drug,Treatment.Route,Subject.Disorder,Treatment.Freq,Treatment,Effect,Subject.Population,Treatment.Duration,Combination.Drug,Subject,Subject.Age,Subject.Gender. 
Text: {0} 
Answer:
 ( adverse event: leading ,  elderly residents: Subject, elderly: Subject.Age, serotonin syndrome: Effect, opioids: Treatment, serotonergic antidepressants: Treatment, opioids: Treatment.Drug, serotonergic antidepressants: Treatment.Drug, opioids: Combination.Drug, serotonergic antidepressants: Combination.Drug) 