antihistamine

n. any drug or agent that inhibits the effects of histamine at central or peripheral histamine receptors, especially H₁ receptors. They may have sedative effects and are a common component of over-the-counter sleeping aids. Some are used in the treatment of allergic reactions or motion sickness (see diphenhydramine; dimenhydrinate). The so-called nonsedating antihistamines have less ability to cross the blood–brain barrier and are used solely in the management of allergic responses. Also called histamine antagonist.

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Psychology term of the day

December 23rd 2024

analysis of transference

in psychoanalysis, the interpretation of a patient’s early relationships and experiences as they are reflected and expressed in his or her present relationship to the analyst. Also called transference analysis. See transference.