Updated: January 25, 2026

What Is Hydroxyzine? Uses, Dosage, and What You Need to Know in 2026

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Peter Daggett

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What Is Hydroxyzine?
What Is Hydroxyzine Used For?
Is Hydroxyzine a Controlled Substance?
Dosage Forms and Typical Doses
How Fast Does Hydroxyzine Work?
Who Should Not Take Hydroxyzine?
The Bottom Line

Overview

Hydroxyzine (Vistaril, Atarax) is a first-generation antihistamine used for anxiety, itching, and sleep. Here's everything patients need to know about it in 2026.

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Hydroxyzine is one of the most versatile and widely prescribed medications in the United States — with over 15 million prescriptions written annually as of 2023, making it the 39th most prescribed drug in the country. Yet many patients receiving it for the first time have questions about what it actually is, how it works, and what to expect.

This guide provides a clear, comprehensive overview for patients starting hydroxyzine or considering it.

What Is Hydroxyzine?

Hydroxyzine is a first-generation antihistamine in the piperazine chemical family, used as an anxiolytic, antipruritic, and sedative. It was first synthesized in 1956 and has been prescribed in the United States since that year, making it one of the older psychiatric and allergy medications still in widespread use.

Vistaril (hydroxyzine pamoate capsules) and Atarax (hydroxyzine hydrochloride tablets). Both brand names have been discontinued — only generics are currently available in the US.

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What Is Hydroxyzine Used For?

Hydroxyzine has several FDA-approved indications:

Anxiety and tension: Used to relieve anxiety and tension associated with psychoneurosis and anxiety-related conditions. It provides fast-acting relief, typically within 15-30 minutes of taking it orally.
Allergic pruritus and urticaria: Relieves itching caused by allergic skin reactions, including chronic hives (urticaria), atopic dermatitis, and contact dermatitis.
Pre- and post-surgical sedation: Used to induce sedation and reduce anxiety before and after general anesthesia.
Nausea and vomiting: Provides antiemetic effects, useful for motion sickness and post-operative nausea.

Hydroxyzine is also used off-label for insomnia, alcohol withdrawal anxiety, and as an adjunct to enhance opioid analgesia.

Is Hydroxyzine a Controlled Substance?

No. Hydroxyzine is not scheduled by the DEA and is not a controlled substance. This is one of its key advantages over benzodiazepines (Schedule IV). It has no abuse potential, no dependence risk, and can be prescribed via telehealth without in-person visit requirements.

Dosage Forms and Typical Doses

Hydroxyzine is available in several forms:

Tablets (hydroxyzine HCl): 10 mg, 25 mg, 50 mg
Capsules (hydroxyzine pamoate): 25 mg, 50 mg, 100 mg
Oral syrup: 10 mg/5 mL (commonly used for children)
Injection (IM only): 25 mg/mL and 50 mg/mL — used in clinical settings

Typical doses for adults:

Anxiety: 25-100 mg orally 3-4 times per day (max 400 mg/day)
Itching: 25 mg orally 3-4 times daily
Sleep: 25-100 mg at bedtime
Pre-surgical sedation: 50-100 mg orally before procedure

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How Fast Does Hydroxyzine Work?

Hydroxyzine is absorbed rapidly from the gastrointestinal tract. Clinical effects — including anxiety relief and sedation — are typically noticeable within 15 to 30 minutes of taking it orally. This rapid onset makes it useful for acute anxiety situations, unlike SSRIs which take 4-6 weeks.

Who Should Not Take Hydroxyzine?

Hydroxyzine is not appropriate for everyone:

Women in the first trimester of pregnancy (contraindicated)
People with known allergy to hydroxyzine, cetirizine, or levocetirizine
People with prolonged QT interval or severe heart disease
Elderly patients (use with caution; Beers Criteria medication)

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The Bottom Line

Hydroxyzine is a proven, affordable, and non-addictive medication with a decades-long track record. For the right patients, it provides effective relief for anxiety, itching, and sleep issues with a generally well-tolerated side effect profile. If you're having trouble finding it at your pharmacy, know that it's available — you may just need to try more than one location.

Use medfinder to find which pharmacies near you have hydroxyzine in stock — without the hold times.

Want to know more? Read how hydroxyzine works (mechanism of action).

Frequently Asked Questions

Hydroxyzine is FDA-approved for anxiety and tension associated with psychoneurosis, allergic pruritus (chronic hives, atopic and contact dermatoses), pre- and post-surgical sedation, and nausea and vomiting. It is also used off-label for insomnia, alcohol withdrawal, and off-label sedation in children.

Hydroxyzine has a half-life of approximately 14-25 hours in adults (longer in the elderly). Effects typically last 4-6 hours at standard doses. The drug is metabolized primarily by the liver and its active metabolite, cetirizine, may persist longer in the body.

No. Both are first-generation antihistamines, but hydroxyzine and diphenhydramine (Benadryl) are different drugs. Hydroxyzine has additional anti-serotonin (5-HT2a) effects that contribute to its anxiolytic properties. Benadryl has stronger anticholinergic effects. They are not interchangeable without medical guidance.

Hydroxyzine can be used regularly for ongoing conditions like chronic urticaria or chronic anxiety, but the FDA label notes that its effectiveness for anxiety beyond 4 months has not been formally studied. For long-term anxiety management, SSRIs are typically considered first-line. Discuss your situation with your prescriber.

Vistaril was the brand name for hydroxyzine pamoate capsules, originally marketed by Pfizer. Pfizer no longer markets Vistaril, but generic hydroxyzine pamoate capsules (the same drug) are widely available. Atarax was the brand name for hydroxyzine hydrochloride tablets, which is also now only available as a generic.

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