Risperidone half-life in a patient taking paroxetine: A case report

J. Barnhill, M. T. Susce, F. J. Diaz, Jose De Leon

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


This case report further establishes the inhibitory effects of paroxetine on risperidone (R) metabolism in a patient whose R was discontinued due to side effects. Baseline through levels in ng/ml were 33 for R, 9 for 9-hydroxyrisperidone (9-OHR) and 42 for the total moiety. The fourth morning after R discontinuation, levels were 4 for R, 1 for 9-OHR and 5 for the total moiety. The estimated half-lives were 23.8 hours for R, 22.8 hours for 9-OHR and 23.5 hours for the total moiety.

Original languageEnglish
Pages (from-to)223-225
Number of pages3
Issue number5
StatePublished - Sep 2005

ASJC Scopus subject areas

  • Psychiatry and Mental health
  • Pharmacology (medical)


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