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Related Experiment Videos

Antihistamines and driving safety.

J F O'Hanlon1

  • 1Institute for Drugs, Safety, and Behavior, Rijksuniversiteit Limburg, Maastricht, The Netherlands.

Cutis
|October 27, 1988
PubMed
Summary

Nonsedating antihistamines, terfenadine and loratadine, do not impair driving performance. These medications, even combined with alcohol, showed no adverse effects on driving ability in controlled studies.

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Area of Science:

  • Pharmacology
  • Traffic Safety
  • Clinical Trials

Background:

  • Nonsedating antihistamines are widely used for allergy relief.
  • Concerns exist regarding potential impairment of cognitive and psychomotor functions.
  • Previous laboratory studies suggested minimal impact on performance.

Purpose of the Study:

  • To evaluate the real-world driving performance effects of terfenadine.
  • To determine if terfenadine or loratadine potentiate alcohol's effects on driving.
  • To validate laboratory findings in a driving simulation setting.

Main Methods:

  • Two placebo-controlled driving performance studies were conducted.
  • Participants received terfenadine, loratadine, or placebo.
  • Driving performance metrics, including vehicle weaving, were assessed.
  • The interaction between antihistamines and alcohol was also evaluated.

Main Results:

  • Terfenadine did not significantly alter vehicle weaving amplitude compared to placebo.
  • No statistically significant differences were observed in driving performance with terfenadine.
  • Neither terfenadine nor loratadine exacerbated alcohol-induced driving impairment.

Conclusions:

  • Terfenadine, a nonsedating antihistamine, does not negatively impact driving performance.
  • Loratadine also does not potentiate the adverse effects of alcohol on driving.
  • These findings support the safety of these antihistamines for users who need to drive.

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