Vistaril (hydroxyzine): uses, side effects, and what to expect

If you or your psychiatrist are considering hydroxyzine for anxiety, you probably have questions about how it works, how fast it works, and what to expect. Vistaril (hydroxyzine) is an antihistamine that Talkiatry psychiatrists commonly prescribe to help manage anxiety, ease short-term stress, and support sleep when anxiety makes it hard to wind down.

Key takeaways

• Vistaril (hydroxyzine) is an antihistamine prescribed for anxiety, short-term stress, and anxiety-related insomnia.
• Hydroxyzine works by blocking histamine receptors in the brain, which produces a calming, sedating effect.
• Most people begin to feel its effects within 30 to 60 minutes of taking it.
• Hydroxyzine is not a controlled substance and does not carry the same risk of dependence as benzodiazepines.

What is Vistaril?

Vistaril is a brand name for hydroxyzine, a medication in the antihistamine class. It is also sold under the brand name Atarax. Hydroxyzine is FDA-approved to treat anxiety, short-term anxiety or acute stress, and insomnia related to anxiety.¹ Unlike benzodiazepines, hydroxyzine is not habit-forming, which is one reason psychiatrists often reach for it as an option for managing anxiety symptoms.

What does Vistaril treat?

Hydroxyzine is prescribed for several conditions related to anxiety and tension.² Below are the uses that are approved by the FDA.

On-label uses

• Anxiety
• Short-term anxiety or acute stress
• Insomnia related to anxiety

How does Vistaril work?

Hydroxyzine calms the brain by dialing down histamine, a chemical that normally keeps you alert and awake. When histamine activity drops, the nervous system quiets, and that can ease both the mental and physical sides of anxiety. Think of it like turning down the volume on a signal that was keeping your brain on high alert.

• Blocks histamine receptors in the brain. Hydroxyzine reduces the activity of histamine, a chemical involved in wakefulness and alertness.¹
• Produces a calming, sedating effect. By quieting certain brain signals, it can help reduce feelings of anxiety and physical tension.
• Helps the body relax. This calming effect can make it easier to fall asleep or settle down during periods of heightened anxiety.

3 things a Talkiatry psychiatrist wants you to know about Vistaril

• It is often used on a short-term or as-needed basis. Hydroxyzine works fairly quickly: Many people notice a calming effect within 30 to 60 minutes after taking it, which makes it a practical option for managing anxiety in the moment. It may also be prescribed as a bridge when starting another medication like an SSRI, providing faster relief before a primary medication takes full effect.
• It can make you sleepy. Drowsiness is one of the most common effects. Some people find this helpful at bedtime, but it is worth knowing that daytime sedation can happen too.
• It is not habit-forming. Unlike medications such as benzodiazepines, hydroxyzine does not carry the same risk of dependence.¹ Your psychiatrist may recommend it as a lower-risk alternative for as-needed anxiety relief.

Common side effects of Vistaril

Most side effects of hydroxyzine are mild and tend to improve as your body adjusts to the medication. Common side effects may include:¹

• Dry mouth
• Drowsiness
• Confusion, particularly in older adults
• Dizziness
• Headache

Talk to your psychiatrist if any of these feel persistent, severe, or get in the way of your day.

Serious side effects of Vistaril and when to seek help

Serious side effects are uncommon, but they do require prompt medical attention. Contact your psychiatrist or seek emergency care if you experience any of the following:¹

• Involuntary trembling or shaking movements; call your doctor right away
• Seizures; seek immediate medical attention
• Skin rash, pus-filled blistering sores, areas of swelling and redness on the skin, or fever; call your doctor immediately

Call your psychiatrist right away or seek emergency care if you experience any of these symptoms.

What to watch for when starting Vistaril

When you first begin taking hydroxyzine, there are a few things to keep in mind:¹

• Hydroxyzine may cause drowsiness. Avoid driving or operating machinery until you know how it affects you.
• Alcohol can intensify the sedating effects of hydroxyzine, so it is best to avoid alcohol while taking this medication.
• Take hydroxyzine exactly as your psychiatrist directs.

What to do if you miss a dose of Vistaril

If you are taking hydroxyzine on a regular schedule and miss a dose, take it as soon as you remember. If it is nearly time for your next scheduled dose, skip the missed dose and continue with your regular schedule. Do not take a double dose to make up for a missed one.¹

Who should talk to a psychiatrist before taking Vistaril

Some health conditions, medications, and life situations change how Vistaril is prescribed. Tell your psychiatrist if any of the following apply to you:¹

• You have a known allergy to hydroxyzine or any of its ingredients
• You have a prolonged QT interval or a family history of prolonged QT interval; your doctor may advise against taking hydroxyzine
• You have a history of slow or irregular heartbeat, heart failure, heart attack, or other heart conditions
• You are pregnant or planning to become pregnant; hydroxyzine should not be taken during pregnancy
• You are breastfeeding; breastfeeding is not recommended while taking hydroxyzine
• You are 65 years of age or older; older adults may be at higher risk for side effects, and safer alternatives may be available
• You take other prescription or nonprescription medications, vitamins, or supplements; your doctor may need to adjust doses or monitor for side effects