Medicines & Supplements A to Z > Atarax


Last updated on 19/10/2021.

Overview   |   Dosage   |    Side Effects   |   Precautions  |   Tips  |   Where To Buy  

GENERIC NAME: Hydroxyzine


DRUG CLASS: Antihistamines

SUB CLASS: Antihistamine (first generation)

USED FOR: Allergic conditions, Anxiety

– 10mg, 25mg (tablets)

What is Atarax for?

Atarax is a brand product that contains Hydroxyzine, which is a type of first generation antihistamine. It is an antihistamine with sedative properties to manage the symptoms (e.g. itchiness) of some allergic conditions like pruritus or hives (urticaria). Atarax can also be used as symptomatic relief of anxiety. 

How to use it?

Atarax is available as tablets. 

For management of allergic skin conditions
The usual dose for adults is 25 mg 3-4 times daily.

For short-term symptomatic relief of anxiety
The usual dose for adults is 50-100 mg 4 times daily.

What are the side effects of Atarax?

Common side effects of Atarax include dry mouth, blurred vision, and constipation.

Who should not take Atarax?

– People who are allergic to to Hydroxyzine or any component of the formulation
– Early pregnancy
– Patients with QT interval prolongation
– Patients 65 years and older are not recommended to use Atarax

Pharmacist Tips:

– As Atarax can cause drowsiness, do not drive or operate machinery until you know how Atarax affects you.
– Avoid alcohol use while taking this medication.

Common dosing schedule:
Atarax can be taken with or without food.
This schedule is for reference only, adjustments may be made according to individual needs.

Some common medications Atarax may interact with:
– Antihistamines, e.g. Chlorpheniramine, Diphenhydramine, Promethazine
– Opioids, e.g. Oxycodone, Fentanyl, Morphine

Please notify your doctor or pharmacist if you are taking the above medication, dosage adjustments might be needed.

Where to buy Atarax in Hong Kong?

In Hong Kong, Atarax is a prescription only medicine, and requires a prescription from a doctor to be purchased in a pharmacy. It can also be obtained from doctors. To find a pharmacy near you, refer to the list of pharmacies (“Authorized Sellers of Poisons”) from the Hong Kong Department of Health.

For more information about drug names and ingredients, you can visit Hong Kong’s Drug Office at

Need more information?

For detailed information about the use of Atarax in children, pregnancy and breastfeeding, and for questions about drug interactions, please check with your pharmacist or doctor.

Disclaimer: our goal is to provide you with the most relevant drug information and common dosage for Hong Kong. This information does not constitute medical advice. For specific treatment recommendations and advice, always discuss with your doctor or pharmacist, and follow the instructions included with your specific medicine.