Hydroxyzine is an antihistamine used to treat allergy symptoms and more. Learn how to use hydroxyzine for anxiety, its dosage, and potential side effects. well-controlled studies in humans. Hydroxyzine may be used in the second and third trimesters of pregnancy, but it should not be used during or just prior to labor. Use of hydroxyzine during labor may increase seizure risk in infants, decrease fetal heart rate, and increase side e Know what Hydroxyzine Pamoate is used for, how to take it, and which side effects to expect when starting it. Hydroxyzine hydrochloride (HCl) and hydroxyzine pamoate are two salt forms of the same active medicine. Taken by mouth, FDA-approved labeling gives them the same approved uses, the same doses, the same warnings, and the same side effects. Hydroxyzine pamoate is the active ingredient found in a medication commonly referred to by its brand name, Vistaril. The medication, which initially was released as an antihistamine, is now also being used as a mild sedative to treat problems including insomnia, anxiety, itching, rashes, nervousness, mood disorders and dementia. Find patient medical information for Hydroxyzine (Atarax, Vistaril, and others) on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings Learn about hydroxyzine pamoate (Vistaril) usage and dosing. Read the latest news and reviews about the drug as well as potential side effects and popular alternatives. Hydroxyzine is used to help control anxiety and tension caused by nervous and emotional conditions. It can also be used to help control anxiety and produce sleep before surgery. Hydroxyzine Pamoate package insert / prescribing information for healthcare professionals. Includes: indications, dosage, adverse reactions and pharmacology. Hydroxyzine, sold under the brand names Atarax (as hydrochloride) and Vistaril (as pamoate) among others, is an antihistamine medication. It is used in the treatment of itchiness, anxiety, insomnia, and nausea (including that due to motion sickness).