Medication Guide
Vistaril (Hydroxyzine): Uses, Side Effects & What to Expect
Hydroxyzine — sold as Vistaril (or Atarax) — is an antihistamine that doubles as a fast-acting, non-addictive option for short-term anxiety. It typically starts working in 15–30 minutes, so it can be used as needed for situational anxiety or anxiety-related sleep trouble. Its main effect is calming and a bit sedating.
Clinically reviewed by the Lyte Psychiatry Clinical Team · Last reviewed June 2026
What is hydroxyzine?
Hydroxyzine is an antihistamine — the same family of medicine used for allergies — that also has a calming effect on the nervous system. That makes it useful for short-term anxiety. It’s sold as Vistaril and Atarax and as a generic, and it is not a controlled substance.
What does hydroxyzine treat?
Hydroxyzine is FDA-approved for the short-term relief of anxiety and tension, and it’s also used for itching, allergic reactions, and nausea. Because it works quickly and isn’t addictive, it’s often used as needed — for example, for situational anxiety or trouble sleeping when anxious.
How fast does it work?
Hydroxyzine usually starts working within 15–30 minutes, with the strongest effect in the first 1–2 hours and calming effects lasting several hours. That fast, on-demand action is its main advantage; it’s generally meant for short-term rather than daily long-term use.
Common side effects
The most common side effects are related to its calming nature:
- Drowsiness
- Dry mouth
- Dizziness
- Headache
Because it can cause drowsiness, use care with driving until you know how it affects you.
A note on dosing
Hydroxyzine is dosed by your prescriber for your situation, often on an as-needed basis. This page intentionally doesn’t give a specific number — the right dose is set with your clinician.
Good to know
Hydroxyzine is not addictive and is not a controlled substance, unlike benzodiazepines used for anxiety. At higher doses it can affect the heart’s rhythm (QT prolongation), so it’s used carefully — or avoided — in people with certain heart-rhythm conditions, which your prescriber will screen for. Avoid combining it with alcohol or other sedatives, which add to drowsiness.
Frequently asked questions
What is Vistaril (hydroxyzine) used for?
Hydroxyzine (brand names Vistaril and Atarax) is an antihistamine FDA-approved for the short-term relief of anxiety and tension. It is also used for itching, allergies, and nausea.
How fast does hydroxyzine work for anxiety?
Hydroxyzine typically starts working within 15 to 30 minutes, with the strongest effect in the first 1 to 2 hours. That makes it useful as an as-needed option.
Is hydroxyzine addictive?
No. Hydroxyzine is not a controlled substance and is not addictive, unlike benzodiazepines such as alprazolam or lorazepam. That is a key reason it is chosen for short-term anxiety.
What are the common side effects of hydroxyzine?
The most common side effects are drowsiness, dry mouth, dizziness, and headache. Use care with driving until you know how it affects you.
Can hydroxyzine help with sleep?
Yes. Because it is calming and a bit sedating, hydroxyzine can help with anxiety-related trouble sleeping. Talk with your prescriber about whether it fits your situation.
Can I drink alcohol while taking hydroxyzine?
No, it is best to avoid alcohol, which adds to the drowsiness hydroxyzine can cause. Avoid combining it with other sedating medications unless your prescriber advises.
Related pages
This page is for general education and is not medical advice or a substitute for care from your own clinician. Medication decisions should always be made with a licensed prescriber who knows your history.
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