Hydroxyzine is an antihistamine used to treat allergy symptoms and more. Learn how to use hydroxyzine for anxiety, its dosage, and potential side effects. Learn how hydroxyzine is used for anxiety, its benefits and risks, common side effects, and when it may or may not be the right treatment option. Hydroxyzine (Vistaril) is a medication prescribed for itching and sometimes for anxiety. It has a number of potential side effects to know about before taking it. Common hydroxyzine side effects include drowsiness, dizziness, and dry mouth. Headaches and constipation can happen, too. But these side effects are generally mild and can be managed at home. Less common but serious hydroxyzine side. Hydroxyzine, sold under the brand names Atarax and Vistaril among others, is an antihistamine medication.It is used in the treatment of itchiness, anxiety, insomnia, and nausea (including that due to motion sickness). Learn about the side effects of hydroxyzine, from common to rare, for consumers and healthcare professionals. Hydroxyzine is used for the short-term treatment of nervousness and tension that may occur with certain mental/mood disorders. Learn about side effects, drug interactions, dosages, warnings, and more. Hydroxyzine is a drug prescribed to treat itching caused by a variety of allergic conditions, nausea, vomiting, and alcohol withdrawal. Common side effects of hydroxyzine are sedation, tiredness, sleepiness, dizziness, disturbed coordination, drying and thickening of oral and other respiratory secretions, and stomach distress. Do not take hydroxyzine if pregnant or breastfeeding. Description 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. This medicine is also used to relieve symptoms of allergic conditions (eg, chronic urticaria and atopic and contact dermatoses). Hydroxyzine is an antihistamine. It works by preventing the effects of a. 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 Hydroxyzine is a prescription medicine used to treat anxiety, tension, allergic skin reactions, nausea, vomiting, and to provide sedation. Learn about doses, side effects, interactions and uses.