H1 Antihistamines

H1 antihistamines and driving

Driving performances depend on cognitive, psychomotor and perception functions. The CNS adverse effects of some H1 antihistamines can alter the patient ability to drive. Data from studies using standardized objective cognitive and psychomotor tests (Choice Reaction Time, Critical Flicker Fusion. Digital Symbol Substitution Test), functional brain imaging (Positron Emission Tomography, functiona...

Interactions of the H1 antihistamines.

An interaction is taken to be the situation in which the administration of a drug or substance induces changes in the pharmacokinetics of another simultaneously administered drug – either increasing or decreasing the plasma concentration of the latter, and thus giving rise to the possibility of adverse reactions [1]. According to the primarily responsible pharmacological mechanism, H 1 antihist...

Comparative pharmacology of the H1 antihistamines.

H1 Antihistamines: Current Status and Future Directions

In this review, we compare and contrast the clinical pharmacology, efficacy, and safety of first-generation H1 antihistamines and second-generation H1 antihistamines. First-generation H1 antihistamines cross the blood-brain barrier, and in usual doses, they potentially cause sedation and impair cognitive function and psychomotor performance. These medications, some of which have been in use for...

antihistamines: psychomotor performance and driving H1 antihistamines: psychomotor performance and driving

As has already been extensively commented in the article on antihistamines and the central nervous system, published in this same issue, all the classical antihistamines and, to a lesser extent, the more recent synthetic compounds are able to exert depressive action upon the central nervous system (CNS), causing drowsiness, lassitude, dizziness, incoordination, and increased reaction time. More...