Praxis Medical Insights

Est. 2024 • Clinical Guidelines Distilled

Made possible by volunteer editors from the University of Calgary & University of Alberta

Last Updated: 8/23/2025

Hydroxyzine and Cognitive Effects in Younger Populations

Introduction to Hydroxyzine

  • Hydroxyzine is a first-generation antihistamine with sedative and anxiolytic properties, approved for use in both Europe and the United States, according to the European Journal of Nuclear Medicine and Molecular Imaging 1, 2
  • The American Academy of Allergy, Asthma, and Immunology notes that first-generation antihistamines like hydroxyzine have been associated with cognitive decline primarily in elderly populations, not specifically in teenagers 3

Risk Factors for Cognitive Effects

  • The American Geriatrics Society suggests that anticholinergic burden is a more significant concern than any single medication, as it can affect memory and cognitive function 3
  • The Journal of Allergy and Clinical Immunology states that long-term use of medications with anticholinergic effects is more concerning than short-term or intermittent use, with a higher risk of cognitive effects in elderly patients 4, 3

Comparative Safety Profile

  • The European Journal of Nuclear Medicine and Molecular Imaging recommends that hydroxyzine has fewer safety concerns in adolescents compared to benzodiazepines, which are often not recommended in children under 16 years of age 1, 2
  • The American Academy of Pediatrics notes that when compared to other sedative options for pediatric patients, hydroxyzine has a relatively favorable safety profile, with the most common side effects being transient sleepiness rather than cognitive impairment 5, 6

Monitoring and Precautions

  • The Journal of Allergy and Clinical Immunology advises that patients should be monitored for cognitive effects, particularly with long-term use, and that lower doses should be considered when possible to minimize anticholinergic burden 4, 3
  • The American Academy of Child and Adolescent Psychiatry recommends avoiding combining hydroxyzine with other medications that have anticholinergic properties to prevent cumulative effects 3, 6

Clinical Considerations

  • The European Journal of Nuclear Medicine and Molecular Imaging suggests that for teenagers requiring anxiolysis, non-pharmacological approaches should be considered first when appropriate, and if medication is necessary, second-generation antihistamines with less anticholinergic activity may be preferable for long-term use 1, 2, 4
  • The Journal of Allergy and Clinical Immunology recommends that when hydroxyzine is used, the lowest effective dose should be prescribed for the shortest duration necessary, to minimize the risk of cognitive effects 3