Hydroxyzine: uses, dosing, side effects & brands

Hydroxyzine Hydrochloride is an antihistamine used to treat Anxiety Disorders, Nausea, Pruritus, Substance Withdrawal Syndrome.

The FDA classifies hydroxyzine as an antihistamine. If you are checking whether it is safe to combine with something else, the class is what matters — two drugs from the same class usually should not be stacked.

The label states hydroxyzine is contraindicated in early pregnancy. It notes that in animal studies (mouse, rat, rabbit) hydroxyzine induced fetal abnormalities in the rat and mouse at doses substantially above the human therapeutic range, and that human data are inadequate to establish safety in early pregnancy — so until such data exist, it is contraindicated early in pregnancy. Anyone who is or may become pregnant should discuss this with their prescriber. This is what hydroxyzine's FDA label says; whether to use it in pregnancy is your prescriber's decision.

The label addresses alcohol in its Precautions. It cautions that the effect of alcohol may be increased by hydroxyzine, because hydroxyzine potentiates the action of central nervous system depressants (it names narcotics, non-narcotic analgesics, and barbiturates). Patients are advised against the simultaneous use of other CNS depressant drugs. This is an additive CNS-depression/sedation caution, not a disulfiram-like flushing reaction. This is what hydroxyzine's FDA label says; alcohol advice depends on your dose and health, so confirm with your pharmacist.

The elimination half-life of hydroxyzine is about 14 to 20 hours in healthy adults (two reported mean values: 20.0 ± 4.1 hours and 14.0 hours) — that is how long the body takes to clear half of a dose. This is the parent drug's elimination half-life. It varies a lot by age — averaging about 29 hours in older adults and about 7 hours in children. Hydroxyzine is broken down into an active metabolite, cetirizine (itself an antihistamine), which is cleared by the kidneys and can build up when kidney function is impaired. Half-life is not the same as how long a drug test can detect the drug, and it varies with age, kidney and liver function.

It depends on the medicine. We check it against the FDA labels rather than guessing: our interaction checker searches each drug's own label for the other and quotes what it says, naming the section it came from. Run hydroxyzine against whatever else you take — and remember that a label not naming a drug is not the same as that combination being safe.

We track 4 hydroxyzine-containing products in the U.S.: Hydroxyzine Pamoate, Atarax, Vistaril and Hydroxyzine Hydrochloride. They are the same active ingredient; they differ in form, manufacturer, price and FDA recall record.

Across the brands we track, hydroxyzine is currently marketed as capsule, tablet, injectable, solution and syrup, per the FDA's National Drug Code Directory. Each form is dosed differently — follow the label for the exact product you were prescribed.

Yes. Our catalog lists 2 generic hydroxyzine products alongside the brand versions. A generic has the same active ingredient and must meet the FDA's bioequivalence standard; it usually costs less. Ask your pharmacist which one your plan covers.

The FDA's Enforcement database lists 1 recall record whose product description mentions hydroxyzine. The most recent: hydrOXYzine Hydrochloride Oral Solution (Jun 2, 2026). A recall applies to specific lots, not to the drug as a whole — check the record for the affected lot numbers.

Hydroxyzine works fast. For itching, anxiety, or its calming, sleepy effect, most people feel it within about 15-60 minutes, with peak effect around two hours and relief lasting several hours. It's meant for on-demand or short-term use, not a slow-building daily medicine. Because it can make you drowsy, don't drive until you know how it affects you.

Alcohol: the FDA label flags alcohol as something to be careful with — see the alcohol section above for what it actually says. This is what the FDA label and our cited sources say — it is not a complete list. Your pharmacist can check your own combination.

No. Hydroxyzine (Vistaril, Atarax) is an antihistamine used for anxiety, itching and nausea; it is NOT a DEA-scheduled controlled substance and is not habit-forming, which is part of why it is chosen as a non-addictive as-needed option. It is sedating, so it can cause drowsiness.

The most common and expected effect of hydroxyzine (sold as Vistaril and Atarax) is drowsiness or sedation, which can be marked. MedlinePlus and the FDA label also list dry mouth, dizziness, and headache, and hydroxyzine's antihistamine action can cause blurred vision. These effects are often strongest when you start or increase the dose. Alcohol and other sedating medicines can make the drowsiness worse.

The most important serious risk is a heart-rhythm problem. The FDA label states that "Cases of QT prolongation and Torsade de Pointes have been reported" and that "Hydroxyzine is contraindicated in patients with a prolonged QT interval." Get emergency care for fainting, or a fast, pounding, or irregular heartbeat. Tell your doctor before starting if you have a long-QT history or take other QT-prolonging drugs — the label says "Caution is recommended during the concomitant use of drugs known to prolong the QT interval." Also call your doctor right away for a rash or blister-like sores, swelling, fever, seizures, or unusual trembling/shaking, which MedlinePlus lists as reasons to "call your doctor immediately."

Both cautions come straight from the FDA label. On driving: "Since drowsiness may occur with use of this drug, patients should be warned of this possibility and cautioned against driving a car or operating dangerous machinery" until you know how it affects you. On older adults, the label warns that "Sedating drugs may cause confusion and over sedation in the elderly; elderly patients generally should be started on low doses of hydroxyzine and observed closely." Its anticholinergic burden (confusion, falls) is why hydroxyzine appears on the American Geriatrics Society Beers list of medicines to use with caution in adults 65 and older.

The FDA label is explicit that this hasn't been proven: "The effectiveness of hydroxyzine as an antianxiety agent for long term use, that is more than 4 months, has not been assessed by systematic clinical studies." Hydroxyzine is generally used short-term or as-needed for anxiety, itching, and sedation rather than as an ongoing daily anxiety treatment. If you've been taking it for months, talk with your prescriber about whether it's still the right option rather than deciding on your own.

Drowsiness typically appears soon after a dose, which is why the FDA warns against driving until you know your response; MedlinePlus notes hydroxyzine is usually taken three or four times a day. Unlike some prescription drugs, hydroxyzine is not known for a dangerous withdrawal reaction, but you should still not stop a prescribed medicine on your own — check with your doctor or pharmacist first, especially if you're taking it for a diagnosed condition. This is not a complete list of side effects; report anything unusual to your clinician.

Hydroxyzine (brand names Vistaril and Atarax) is an antihistamine with three FDA-approved uses: to relieve anxiety and tension, to relieve itching caused by allergic skin conditions like chronic hives (urticaria) and dermatitis, and as a sedative before and after general anesthesia for surgery (MedlinePlus). Off-label — legal and common, but not FDA-approved for this drug — clinicians also prescribe it as a short-term sleep aid for insomnia and to control nausea and vomiting, uses that draw on its antihistamine and antiemetic properties. Because it is fast-acting and non-addictive, it is often chosen when a doctor wants to avoid habit-forming options. This is not a complete list; ask your prescriber which use applies to you, and never start or stop a prescription on your own.

Yes — anxiety and tension are among hydroxyzine's FDA-approved uses (MedlinePlus), so this is an on-label indication, not off-label. It is an antihistamine rather than a benzodiazepine, which makes it a fast-acting and non-addictive option that is often used short-term or as-needed for anxiety. The main trade-off is that it is sedating and can cause drowsiness, so it is typically prescribed for short-term relief; its labeling notes that effectiveness as an anti-anxiety agent for long-term use (more than about four months) has not been well established, so it is generally used short-term. Whether it is the right fit depends on your situation — discuss it with your prescriber rather than adjusting a prescription yourself.