Active Ingredient

Hydroxyzine

Hydroxyzine is an antihistamine used to treat allergy symptoms and anxiety. It helps reduce itching and swelling caused by allergic reactions.

It is also used to manage anxiety and tension in adults. Hydroxyzine is sometimes used as a sedative to help relax patients before or after surgery.

Written By Douglas C. Goldberg, MD

Reviewed By Philip Schein, MD

Last Updated 28 Nov 2025

Available Hydroxyzine Brands

Atarax

Strengths 10mg, 25mg

Hydroxyzine Uses

Hydroxyzine is commonly used for a variety of conditions related to allergies and anxiety.

Relief of itching caused by allergic skin reactions
Management of anxiety and tension
Pre-operative sedation
Control of nausea and vomiting
Adjunct in pre- and post-operative sedation

How Hydroxyzine Works

Hydroxyzine works by blocking the action of histamine, a substance in the body that causes allergic symptoms. This helps reduce symptoms like itching and swelling.

It also has calming effects on the brain, which helps reduce anxiety and tension. These sedative properties make it useful for pre-operative relaxation.

Common side effects of Hydroxyzine

Not everyone experiences side effects from hydroxyzine, and many side effects are mild and temporary.

Drowsiness
Dizziness
Dry mouth
Headache
Blurred vision
Stomach upset
Constipation

If you experience serious or persistent symptoms, contact your doctor.

Avoid driving or operating heavy machinery until you know how hydroxyzine affects you.
Limit alcohol intake while taking this medication.
Inform your doctor about any other medications you are taking to avoid interactions.
Do not use hydroxyzine if you have a known allergy to it or similar medications.
If you experience difficulty breathing or severe dizziness, seek medical attention immediately.

Always consult your doctor for personalized medical advice.

Frequently Asked Questions

What is hydroxyzine used for?

Hydroxyzine is used to treat allergy symptoms, manage anxiety, and as a sedative before or after surgery.

How does hydroxyzine work?

It blocks histamine to reduce allergic symptoms and has calming effects on the brain to help with anxiety.

Can I drink alcohol while taking hydroxyzine?

It is advisable to limit alcohol consumption, as it can increase drowsiness and dizziness.

How long does it take for hydroxyzine to work?

Hydroxyzine typically starts working within 30 minutes to an hour after taking it.

Are there any serious side effects I should watch for?

Seek medical help if you experience difficulty breathing, severe dizziness, or any signs of an allergic reaction.