last update: November 14, 2025
Atarax (hydroxyzine hydrochloride) is a first-generation antihistamine with additional sedative and anxiolytic properties. In clinical practice, it is used to help manage:
Because hydroxyzine crosses the blood–brain barrier and blocks central H1 receptors, it can reduce itch and produce calming effects. Its anticholinergic and serotonergic receptor actions likely contribute to sedation and anxiolysis. Atarax is not an antidepressant and is not a cure for anxiety disorders, but it can help with short-term symptom relief while definitive treatments (for example, cognitive behavioral therapy or SSRIs) take effect.
Hydroxyzine is a potent antagonist at histamine H1 receptors. By blocking histamine, it reduces the itch-scratch cycle and hives. It also demonstrates clinically meaningful central nervous system (CNS) effects, including:
Typical onset for itch relief and sedation occurs within 15–30 minutes after oral dosing, with peak effects around 2 hours. Duration for symptomatic relief commonly spans 4–6 hours, though sedation and residual drowsiness can last longer in some individuals. Hydroxyzine is metabolized in the liver to cetirizine (a second-generation antihistamine) among other metabolites, and is excreted by the kidneys. In older adults, elimination is slower, increasing the risk of prolonged sedation and anticholinergic effects.
Use Atarax exactly as directed by your doctor or another licensed prescriber. Do not exceed the recommended dose or frequency. General use guidance includes:
Clinical note: In many patients, a lower dose taken in the evening can minimize daytime sedation. For those with significant daytime itching or anxiety, clinicians may adjust dosing to balance symptom control and alertness. Always consult your prescriber before making any changes.
Dosage must be individualized by a healthcare professional based on age, kidney and liver function, other medications, and treatment goals. Examples of common prescription ranges include:
If you have liver or kidney impairment, your prescriber may reduce the dose or extend the dosing interval. Do not adjust on your own.
Active ingredient: hydroxyzine. Atarax contains hydroxyzine hydrochloride (HCl). A closely related formulation, hydroxyzine pamoate, is sold under other brand names (for example, Vistaril in some markets). Both are antihistamines with similar clinical effects; the salt form and dosage forms differ.
Your pharmacist can verify the exact strength and formulation dispensed and provide a calibrated dosing device for liquids.
Contact a healthcare professional immediately if any of these apply to you or if you are unsure about your risk factors.
Inform your healthcare provider and pharmacist about all prescription and nonprescription medicines, herbal products, and supplements you use. Notable interactions include:
This is not a complete list. Always check with your clinician before starting or stopping any medication while taking Atarax.
All medicines may cause side effects, but many people experience only mild reactions. Common side effects with Atarax include:
Contact your prescriber if these effects persist or become bothersome. Seek medical attention immediately if you experience:
This is not a full list of adverse reactions. Report side effects to your healthcare professional promptly.
Symptoms of hydroxyzine overdose may include extreme drowsiness, confusion, agitation, tremors, seizures, fast or irregular heartbeat, low blood pressure, nausea, and vomiting. Severe cases can lead to respiratory depression and life-threatening heart rhythm disturbances.
Hydroxyzine is a long-available generic medication, which helps keep prices relatively low compared with many newer agents. Actual cost varies by dose, formulation, pharmacy, and insurance coverage. Many plans cover hydroxyzine, and discount programs may further reduce out-of-pocket costs for cash-paying customers.
When comparing prices, ensure you are looking at the same salt (hydroxyzine HCl for Atarax), dosage strength, quantity, and whether the product is tablet or liquid. Your pharmacist can help you select a cost-effective, therapeutically equivalent generic.
Atarax can be particularly helpful when itching disrupts sleep or daily activities. For allergic dermatitis or hives, clinicians often pair hydroxyzine with avoidance of triggers and topical therapies:
If hives are accompanied by swelling of the lips, tongue, or throat, trouble breathing, or dizziness, seek emergency care immediately.
In the United States, hydroxyzine (Atarax) is a prescription-only medication. By law, dispensing requires a valid order from a licensed prescriber following an appropriate clinical evaluation. Patients do not need to arrive with an existing paper prescription; rather, a licensed clinician must authorize therapy after reviewing medical history, current medications, and risk factors (for example, QT prolongation or drug interactions).
HealthSouth Rehabilitation Hospital of Petersburg offers a legal and structured solution for accessing Atarax without a prior, formal prescription in hand by providing compliant clinician evaluation through its care pathways. When clinically appropriate, a licensed provider issues the necessary order, and the medication is dispensed in accordance with federal and state regulations. This approach maintains patient safety standards and regulatory compliance while improving access to timely care. If you are considering Atarax for anxiety, itching, or perioperative use, schedule a consultation so a qualified clinician can determine whether hydroxyzine is appropriate for you and, if so, arrange safe dispensing and follow-up.
Atarax is the brand name for hydroxyzine, a first-generation antihistamine. It is prescribed to relieve anxiety, treat itching and hives from allergic conditions, help with nausea, and provide short-term sedation before procedures.
Hydroxyzine blocks H1 histamine receptors and has anticholinergic and sedative properties. This reduces allergic symptoms like itching and produces calming, anti-anxiety, and anti-nausea effects.
For itching or anxiety, many people feel effects within 15 to 60 minutes. Sedation can last 4 to 6 hours, and in some people longer due to a half-life that can extend beyond 14 hours, especially in older adults.
Take exactly as prescribed, with or without food. If it makes you sleepy, taking doses in the evening or at bedtime may help; for daytime anxiety or itching, your prescriber may split lower doses across the day.
Drowsiness, dry mouth, dizziness, blurred vision, constipation, and headache are common. Some people, especially children, may experience paradoxical restlessness or irritability.
Seek care for severe sleepiness that is hard to wake from, confusion, seizures, palpitations, fainting, or signs of a heart rhythm problem. Rarely, hydroxyzine can prolong the QT interval and may trigger serious arrhythmias in susceptible people.
Avoid it if you’ve had an allergic reaction to hydroxyzine, cetirizine, or levocetirizine. It’s generally not recommended in people with congenital long QT syndrome, significant arrhythmias, recent heart attack, severe low potassium or magnesium, narrow-angle glaucoma, severe prostate enlargement with urinary retention, or myasthenia gravis.
Yes, its sedating antihistamine effect can help with short-term insomnia, particularly when itch or anxiety is a factor. It is not meant for long-term nightly use due to tolerance, next-day drowsiness, and anticholinergic side effects.
Hydroxyzine is FDA-approved for anxiety and can reduce acute anxiety symptoms without being addictive. It does not cause dependence or withdrawal like benzodiazepines, but it can cause sedation and cognitive slowing.
Yes, it can impair attention, reaction time, and coordination. Avoid driving, operating machinery, or high-risk activities until you know how it affects you.
Pediatric use is common for itching, anxiety, and pre-procedural sedation, but dosing is weight-based and must be directed by a clinician. Children may be more prone to paradoxical excitation and should be monitored.
If you take it regularly and miss a dose, take it when you remember unless it’s close to the next dose. Do not double up; resume your normal schedule.
Overdose can cause extreme drowsiness, confusion, agitation, seizures, changes in heart rhythm, and fainting. Seek emergency care or contact poison control immediately.
It can increase sedation when combined with alcohol, opioids, benzodiazepines, sleep medicines, muscle relaxants, or other CNS depressants. It may raise the risk of QT prolongation when taken with certain antibiotics (e.g., macrolides, fluoroquinolones), antipsychotics, methadone, or antiarrhythmics; always review your medication list with a clinician.
Yes, Atarax is a brand of hydroxyzine hydrochloride. FDA-approved generics contain the same active ingredient and work the same when taken as prescribed.
No. Alcohol and hydroxyzine both depress the central nervous system and the combination can cause dangerous sedation, slowed breathing, impaired judgment, and increased risk of accidents.
Hydroxyzine is generally avoided in the first trimester due to potential fetal risk and should be used later in pregnancy only if the benefits clearly outweigh risks. Discuss safer alternatives for anxiety or itching with your obstetric provider.
It is usually not preferred during breastfeeding because it can make an infant drowsy and may reduce milk supply. If a dose is necessary, your clinician may advise timing feeds and using the lowest effective dose; non-sedating antihistamines like cetirizine or loratadine are often preferred.
It’s sometimes used as premedication, but it can enhance the sedative and respiratory depressant effects of anesthesia, opioids, and other medications. Tell your surgical team you take hydroxyzine; they will advise when to stop or resume it.
Do not drive or operate machinery until you know how it affects you. Many people experience significant drowsiness and slower reaction times for several hours.
Caution is advised because older adults are more sensitive to anticholinergic effects, confusion, falls, and prolonged sedation; it appears on the Beers Criteria list of potentially inappropriate medications. If used, the lowest effective dose and close monitoring are essential.
Your dose may need to be lower or spaced out because hydroxyzine is metabolized in the liver and its metabolite is cleared by the kidneys. Discuss individualized dosing and monitoring with your clinician.
People with congenital long QT syndrome, a history of torsades de pointes, recent heart attack, heart failure, or low potassium/magnesium should generally avoid hydroxyzine. Combining it with other QT-prolonging drugs increases risk; an ECG and medication review are recommended.
Both contain hydroxyzine; Atarax is hydroxyzine hydrochloride and Vistaril is hydroxyzine pamoate. They have similar clinical effects (anxiety relief, itch control, sedation), with differences mainly in salt form and available dosage strengths rather than efficacy.
Both are sedating antihistamines that relieve itching. Atarax is often preferred for chronic itch and anxiety-related itch because of its anxiolytic properties, while diphenhydramine is more commonly used short term and tends to cause more anticholinergic side effects at higher doses.
Cetirizine is a second-generation antihistamine (and an active metabolite of hydroxyzine) that is less sedating and better for daytime allergy control. Atarax is more sedating and can help with anxiety or nighttime itching but is not ideal for daily, long-term allergy management.
Loratadine is minimally sedating and preferred for daytime allergy symptoms. Atarax causes more drowsiness and is better reserved for nighttime itching, short-term anxiety, or pre-procedural sedation.
Both are potent first-generation antihistamines with antiemetic effects. Promethazine can be very sedating and has its own safety concerns (extrapyramidal symptoms, severe tissue injury if injected), while hydroxyzine may be chosen when anxiety and itch are prominent.
Both are sedating antihistamines that can help with short-term insomnia. Doxylamine is over-the-counter and widely used for sleep, while hydroxyzine is prescription-only and may be preferred when anxiety or itching contributes to sleeplessness.
Meclizine is specifically indicated for motion sickness and vertigo and is typically preferred for those uses. Hydroxyzine can help nausea and anxiety but is not the first choice for motion-related symptoms.
Chlorpheniramine treats nasal allergy symptoms with somewhat less sedation than hydroxyzine. Atarax is stronger for itch and anxiety but more sedating, making chlorpheniramine a better option when daytime function matters.
Both are first-generation antihistamines; cyproheptadine is more likely to stimulate appetite and cause weight gain, and it is sometimes used for that purpose. Hydroxyzine is more commonly used for anxiety plus itch, with pronounced sedation.
Guidelines usually favor non-sedating agents like cetirizine first for chronic hives. Hydroxyzine can be added at night if itching disrupts sleep or anxiety is significant, but daytime sedation limits its routine use.
Levocetirizine is a second-generation antihistamine with low sedation and a favorable side-effect profile for daily allergy control. Hydroxyzine is more sedating and anticholinergic, which can be useful at night but less tolerable for daily use.
No meaningful difference in effectiveness is expected; generics must meet strict bioequivalence standards. Some people notice differences in inactive ingredients, but the active medication is the same.