title: Cetirizine-associated delusions and depression in an 18-year-old woman.
abstract: BACKGROUND
  Cetirizine is a second-generation H1 histamine receptor antagonist that is commonly used for symptomatic relief of hay fever and other allergies and can be combined with pseudoephedrine hydrochloride, a decongestant. The most common adverse effects include headache, nausea, nasopharyngitis, vomiting, and coughing.
  
  
  OBJECTIVE
  To report on an adolescent 18-year-old woman who developed delusional thinking and depression after starting treatment with cetirizine.
  
  
  METHODS
  We report on an adolescent 18-year-old woman who developed delusional thinking and depression after starting treatment with cetirizine. Once cetirizine was discontinued, the patient returned to her clinical baseline.
  
  
  CONCLUSIONS
  Physicians need to be aware of the potential psychiatric adverse effects associated with cetirizine.
authors.affiliation: Weill Cornell Medical College, New York Presbyterian Hospital, White Plains, NY, USA.
authors.forename: Benjamin C
authors.initials: BC
authors.lastname: Garden
authors.forename: Dimitry
authors.initials: D
authors.lastname: Francois
mesh_terms: D000293:Adolescent; D017332:Cetirizine / Q000009:adverse effects*; D003702:Delusions / Q000139:chemically induced*; D003863:Depression / Q000139:chemically induced*; D005260:Female; D039563:Histamine H1 Antagonists, Non-Sedating / Q000009:adverse effects*; D006801:Humans
chemical_list: D039563:Histamine H1 Antagonists, Non-Sedating; D017332:Cetirizine