Hydroxyzine: study card

Generic name

Hydroxyzine

Class

Antihistamine / antianxiety agent

Mechanism

Not a cortical depressant; action may be due to suppression of key subcortical CNS regions; antihistaminic effects demonstrated.

Used for

Symptomatic relief of anxiety and tension associated with psychoneurosis, and adjunctive use in organic disease states with anxiety; Pruritus from allergic conditions or mediated by histamine; Sedation as premedication and following general anesthesia

Common side effects

Dry mouth; Drowsiness; QT prolongation

Warnings

Early pregnancy; Prolonged QT interval; Hypersensitivity incl. cetirizine, levocetirizine; Long-term effectiveness for anxiety beyond 4 months has not been assessed in systematic clinical studies

Brand questions use only name pairings verified against the linked product source. Unverified pairings are withheld from these questions; the other study content remains available.

Label date: 20260805 · For learning, not clinical decisions. US label and brand information; always consult the current source.

Source snapshot checked: 2026-10-21. The source document and selected fields were compared. The complete card has not had an independent clinical review.