diphenhydramine

n. a sedating antihistamine at H₁ receptors that also possesses activity at cholinergic and other receptor sites. It is used generally to suppress allergic responses and, in mental health, as a sedative and hypnotic or to suppress the parkinsonian symptoms induced by conventional antipsychotic drugs. U.S. trade name (among others): Benadryl.

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Psychology term of the day

May 8th 2024

PI

1. abbreviation for prescribing information. See labeling.

2. abbreviation for proactive interference.

3. abbreviation for progressive interval. See progressive-interval schedule.