Which statement about H1 antihistamines is true?

Prepare for the Lippincott Pharmacology Exam with interactive flashcards and multiple-choice questions, each accompanied by detailed hints and explanations. Master your exam with ease!

Second-generation H1 antihistamines are characterized by their selective action on peripheral H1 receptors and their ability to cross the blood-brain barrier to a much lesser extent than first-generation agents. This reduced central nervous system penetration leads to fewer sedative effects and a lower incidence of other adverse effects commonly associated with first-generation antihistamines, such as drowsiness and impaired motor coordination. Due to this profile, second-generation H1 antihistamines are often preferred for the management of allergic conditions like allergic rhinitis because they offer efficacy with a more favorable safety profile.

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