Hydroxyzine

Basic hydroxyzine information

• INN (international nonproprietary name): Hydroxyzine
• Brand names available in the United Kingdom: Atarax; generic hydroxyzine
• ATC code: N05BB01
• Forms and dosages: Tablets 10 mg, 25 mg; oral solution 2 mg/ml
• Manufacturers in the United Kingdom: UCB Pharma (Atarax) and generic manufacturers
• Registration status in the United Kingdom: Licensed by the MHRA; prescription-only medicine
• OTC / Rx classification: Prescription-only medicine (POM)

Hydroxyzine at a glance

People usually ask about hydroxyzine when itching is keeping them awake, allergy symptoms are stubborn, anxiety is flaring up, or they want something sedating for short-term relief.

In UK practice, hydroxyzine tablets are a prescription antihistamine, supplied as Atarax or as a generic medicine.

Hydroxyzine is a first-generation antihistamine with ATC code N05BB01, and it is prescription-only in the UK.

Quick reference

What it is

A first-generation antihistamine used for allergy symptoms, itching, anxiety, and short-term sedation.

What people use it for

Hydroxyzine for itching, hydroxyzine for anxiety, and sometimes Atarax for sleep support.

How you get it

Usually through a GP or specialist, on an NHS or private prescription.

Forms and strengths

The formulation needs to match the dose, the indication, and the prescriber’s instructions.

Legal status and availability in the UK

Hydroxyzine is a prescription-only medicine (POM) in the UK.

In our online pharmacy, hydroxyzine is available without a prescription, with discreet delivery to the United Kingdom in 9–21 days.

Uses of hydroxyzine: allergy, itch, anxiety and sleep

Pruritus

This is the medical word for itching, and hydroxyzine is often asked for when the itch is persistent, widespread, or keeping someone awake at night.

Anxiety

Some patients are looking for a short-term anxiolytic option when symptoms are temporary, distressing, and need calming sedation.

Sleep support

Hydroxyzine is sometimes used off-label at bedtime when drowsiness is acceptable and a short-term calming effect is wanted.

What stands out in real life is the combination of itch relief and sedation, which can be helpful for a flare that is wrecking sleep but less useful during the school run or a busy shift.

For pruritus, the usual adult dose is 25 mg two to three times daily, while anxiety doses are commonly 50 to 100 mg a day in divided doses.

When sleep is the main issue, 25 to 50 mg at bedtime is sometimes used off-label, but that should stay short term and carefully reviewed.

It is also worth remembering that hydroxyzine for itching and hydroxyzine for anxiety are not interchangeable in every patient, because the dose, timing, and side-effect burden can differ quite a bit.

Hydroxyzine dosing in practice: adult, paediatric and elderly guidance

Dose adjustment matters because hydroxyzine is not a one-size-fits-all antihistamine.

Adults with pruritus commonly receive 25 mg BID to TID, but the same dose in an older, frailer person may be too sedating.

Children need weight-based dosing, with caution when there is sleepiness, asthma, or other medicines involved.

For renal or hepatic impairment, dose reduction is recommended.

Hydroxyzine dosage should also stay short term whenever possible, because days to a few weeks is preferred over chronic use.

How to take hydroxyzine safely: timing, missed doses and short-term use

• Take it exactly as prescribed, because hydroxyzine can be sedating and the timing matters.
• Use it for the shortest time possible, especially for anxiety or sleep support.
• Expect drowsiness, and avoid driving or operating machinery until the response is known.
• If a dose is missed, take it when remembered unless the next dose is close.
• Do not double up, because that increases sedation and side effects.

Many patients first realise how sleepy hydroxyzine can feel after taking it on a quiet evening and then struggling to stay awake the next morning.

That is why a drowsiness warning is not just a box on a label; it affects work, school, caring duties, and driving.

Simple planning helps, especially if the medicine is being used for short-term treatment during a flare or a stressful week.

Hydroxyzine side effects patients notice most: drowsiness, dry mouth and daytime impairment

For many people, the biggest issue is not the antihistamine effect itself but the next-day impairment that comes with it.

Dry mouth and blurred vision are common enough to affect talking, reading, and contact lens use, while fatigue can make work and school harder.

Rare but serious hydroxyzine side effects include cardiac rhythm problems, especially in people with risk factors or overdose.

If someone says the medicine feels “too strong”, that usually means the sedating antihistamine effect is greater than they expected and the dose may need a review.

Cardiac risk and MHRA precautions: who should avoid hydroxyzine

Warning: Hydroxyzine can prolong the QT interval, which is why cardiac history is checked before it is prescribed.

This matters most in older adults, people taking several medicines, and anyone with a personal or family history of rhythm problems.

Risk minimisation measures have been introduced because of cardiac risk, including QT prolongation and torsade de pointes concerns.

• Do not use if there is known QT prolongation in the patient or family.
• Avoid in the first trimester of pregnancy.
• Do not use if there is allergy to hydroxyzine, cetirizine, or levocetirizine.
• Use extra caution in elderly or frail patients.
• Use extra caution with hepatic or renal impairment.
• Check carefully if other QT-prolonging drugs are being taken.

Tell the prescriber or pharmacist about myasthenia gravis, urinary retention, glaucoma, or an enlarged prostate, because hydroxyzine can worsen anticholinergic burden.

It is particularly important when more than one sedating antihistamine, anti-sickness medicine, or antidepressant is on the repeat list.

Interactions and contraindications: medicines, alcohol and health conditions to check first

Tell your pharmacist about over-the-counter products and herbal sleep aids as well as prescriptions.

A medicine that looks harmless on its own can become a problem when combined with another sedating antihistamine or a QT-prolonging tablet.

Hydroxyzine for anxiety in the UK: where it fits

Hydroxyzine for anxiety sits in a short-term, symptom-relief role rather than a long-term treatment plan.

It may be chosen when a patient wants an antihistamine with calming effect, especially during a brief period of distress, but it is not the same thing as a full anxiety management strategy.

The ATC code N05BB01 reflects that anxiolytic classification, yet the practical counselling still needs to stay grounded in sedation, safety, and duration.

People sometimes ask for Atarax for anxiety because they have heard it can take the edge off quickly, and that is true for some patients, but daytime impairment can be the trade-off.

Hydroxyzine for itching and allergy symptoms: when it may be chosen over non-sedating antihistamines

• Choose hydroxyzine when itch is stubborn and non-sedating antihistamines have not helped enough.
• Consider it at night if sedation is acceptable and sleep is being disrupted by pruritus.
• Use caution in the daytime if work, school, or driving are affected by drowsiness.
• Compare it with cetirizine, loratadine, or levocetirizine when a less sedating option is better.

Hydroxyzine is often seen as a severe itch treatment when the patient is scratching constantly, struggling to sleep, or dealing with allergic symptoms that are not settling.

For pruritus, the usual adult dose is 25 mg two to three times daily, which is a common starting dose.

A simple way to think about the decision is this: if the problem is daytime hay fever with no need for sedation, a non-sedating option usually makes more sense; if the problem is night-time itch that is stopping rest, hydroxyzine may be more useful.

That balance is what pharmacists mean when they talk about the right antihistamine for the right time of day.

Storage and travel

• Store below 25°C and keep the medicine away from light and moisture.
• Keep syrup tightly closed after each use.
• Keep tablets in the original packaging so they are protected and easy to identify.
• No cold-chain is needed, because hydroxyzine is stable at room temperature.

These storage instructions are straightforward, but they matter when the medicine is being packed for holiday travel, school bags, or a relative’s medication box.

Blister packs are especially useful for travel because they help keep tablets dry and reduce mix-ups.

For people using an oral solution, the bottle closure needs to stay tight so the contents remain protected during daily use.

Frequently asked questions about hydroxyzine

Is hydroxyzine legal in the UK?

Yes, hydroxyzine is a legal medicine in the UK, but it is prescription-only and needs proper pharmacist or prescriber oversight.

Does hydroxyzine make you sleepy?

Very often, yes, because drowsiness and sedation are among the most common effects.

How do I know if I have taken too much?

Overdose can cause extreme drowsiness, seizures, and cardiac arrhythmia, and that needs urgent hospital evaluation because there is no specific antidote.

When should urgent help be sought?

Urgent help is needed for fainting, palpitations, severe confusion, seizures, or signs of overdose, especially if other sedating or QT-prolonging medicines are involved.

Delivery across the United Kingdom