Hydroxyzine
In stock
10mg · 25mg
from 27,69 £
In brief
Hydroxyzine blocks the effects of histamine to relieve certain types of itching. Its calming and sedating properties also account for its use in some anxiety treatment plans.
Hydroxyzine: dosage, side effects and safety
Product overview
Hydroxyzine is a versatile antihistamine medication that is used for more than allergy relief. Because its active properties can easily reach the brain, it provides a remarkably calming effect on the nervous system. As a result, it is widely utilised not only to soothe severe allergic itching, hives, and contact dermatitis, but also to effectively manage daily anxiety and sleep disturbances. Furthermore, this medication is frequently recommended to prevent nausea and vomiting, or to safely induce a relaxed, sedative state both before and after general anaesthesia procedures. To ensure the treatment perfectly matches your individual needs, this preparation is available in several convenient formats, including tablets and an oral solution. In the UK, it is commonly recognised under popular brand names such as Ucerax and Atarax, as well as its generic variants. One benefit of this medicine is that, unlike benzodiazepines, it is not associated with a significant risk of physical dependence or addiction.What is Hydroxyzine and what is it used for
This medication is highly versatile and effectively treats several different conditions. First and foremost, it works across the entire body to stop allergic reactions by actively blocking histamine, which is the natural chemical responsible for triggering uncomfortable symptoms like severe itching, rashes, and contact dermatitis. Consequently, it provides rapid relief for various skin allergies, including hives. Furthermore, it directly lowers the activity within your central nervous system, which safely produces a noticeable sedative and calming effect. Because of this dual action, it is frequently utilised to manage short-term anxiety, and it is even administered alongside other medications during surgical procedures involving general anaesthesia. It exists as two salts, hydrochloride and pamoate, which work in the same way once inside your body. It is clinically prescribed for the following reasons:Management of anxiety and stress
- Management of acute and chronic emotional tension. It provides a steady calming effect for the user.
- Reduction of physical manifestations of stress. This includes muscle tension and general agitation.
Relief for skin allergies and pruritus
- Rapid relief from pruritus (itching). This is caused by conditions such as urticaria, eczema, and dermatitis.
- Control of histamine-mediated reactions. It works for cases that do not respond to second-generation antihistamines.
Sleep support and nausea control
- Support for natural sleep cycles. It is used in cases of occasional insomnia or restless nights.
- Prevention and treatment of motion sickness. It is also effective for managing symptoms of nausea.
How it works
Pharmacodynamics: H1-receptor antagonism
The medicine works by changing how chemicals communicate in your brain and peripheral tissues. Its primary pharmacological action is to function as a potent H1-receptor antagonist. This means its main job is to block histamine. Histamine is the chemical your immune system releases during an allergic reaction. This causes redness, swelling, and intense itching. By blocking these receptors, the medicine quickly stops these histamine-mediated allergy symptoms.Neurological action on 5-HT2A serotonin receptors
Unlike standard antihistamines, this drug also blocks a specific serotonin receptor in the brain, known as the 5-HT2A receptor. Serotonin regulates your mood and general feelings. Adjusting this specific pathway helps lower your anxiety levels significantly. It makes you feel relaxed without the heavy "drugged" feeling often associated with stronger sedatives. Finally, it has a mild anticholinergic drying effect on the body. This helps to stop nausea and vomiting effectively by calming the vestibular system.Safety and non-addictive profile
The medicine does not interact with the brain's GABA receptors like strong sedatives or benzodiazepines. It provides a gentle calming effect through histamine and serotonin modulation. It does not form a dangerous habit or physical dependence.- Blocks H1-histamine receptors: Stops the allergic response and causes initial therapeutic drowsiness.
- Antagonises 5-HT2A serotonin receptors: Helps balance your mood and reduces feelings of panic.
- Relaxes the stomach and vestibular nerves: Prevents motion sickness and feeling sick.
- Low risk of addiction: It does not alter the brain's dopamine reward system.
Pharmacokinetics
Absorption, bioavailability and distribution
This section explains how your body processes the medicine through the ADME cycle (Absorption, Distribution, Metabolism, and Elimination). Clinical data from the eMC shows it is quickly absorbed with a high bioavailability of approximately 80%. When you swallow a tablet, the process begins immediately. You will usually start to feel less anxious within 15 to 30 minutes. The same timeline applies to pruritus (itching) relief.Liver metabolism via CYP3A4/5 and cetirizine conversion
The medicine reaches its peak plasma level (Cmax) in your blood in about two hours. Once inside, it spreads throughout your body with a large volume of distribution (Vd), approximately 7–16 L/kg. The active molecule travels especially well to the skin. Your liver breaks down the medicine through the CYP3A4 and CYP3A5 enzyme systems into a new active chemical. This chemical is called cetirizine. Cetirizine is another well-known allergy medicine. It helps keep your allergy symptoms away for a longer time. This metabolic process extends the therapeutic effect of each dose.Elimination, half-life and clearance
For a healthy adult, the elimination half-life is about 20 hours. This is the time needed to remove half of the medicine from your system. The process takes longer in older adults, lasting up to 29 hours due to decreased hepatic clearance. It is much faster in children, taking about 7 hours. Finally, the medicine leaves your body mostly through your urine as inactive metabolites.- Fast absorption: High bioavailability ensures it starts working in 15 to 30 minutes.
- Large distribution: Travels effectively to the skin and crosses the blood-brain barrier.
- Hepatic processing: Liver enzymes convert it into cetirizine for extended relief.
- Renal elimination: Doses need to be timed carefully as it takes over 24 hours to clear fully.
Dosage
General guidelines for adults
Understanding the correct dosage is very important. The right dose strictly depends on what you are treating, your age, and your overall health. For adults treating anxiety—especially when it is related to underlying organic diseases or the emotional tension associated with psychoneurosis—a typical daily dose ranges from 50mg to 100mg, which is usually split into four separate smaller doses taken throughout the day. Furthermore, it is essential to periodically review your usage with a professional, as clinical studies have not formally evaluated the safety of taking this treatment for longer than four continuous months. Overall, it is always best to use the lowest dose that works for the shortest amount of time.Adjustments for age and health conditions
Meanwhile, older adults should not take more than 50mg a day because their bodies process the medicine slower, making side effects like sleepiness much more severe. For children, the dose is carefully calculated based on their body weight or specific age group. This is particularly relevant when the medicine is used to calm acute emotional distress, prepare a child for dental procedures, or act as a relaxing adjunct before and after surgery. Finally, people with liver or kidney problems will undeniably need a lower dose to stay completely safe.| Condition and age group | Standard recommended dose | Maximum daily dose |
|---|---|---|
| Anxiety in adults | 50mg to 100mg a day, split into 4 separate doses. | 100mg |
| Itching and hives in adults | 25mg at night, up to 25mg 3 to 4 times a day if needed. | 100mg |
| Sleep problems in adults | 25mg to 50mg taken 30 to 60 minutes before bed. | 100mg |
| All uses for elderly adults | Start with 25mg at night, maximum 25mg twice a day. | 50mg |
| Anxiety in children (under 6 years) | Up to 50mg a day, split into smaller doses. | 50mg |
| Anxiety in children (over 6 years) | 50mg to 100mg a day, split into smaller doses. | 100mg |
| Itching in children (under 40kg) | 1mg to 2mg per kilogram of body weight a day, split up. | 2mg per kg |
Handling missed doses and potential overdose
If you happen to forget a dose during your daily routine, you should take it as soon as you remember. However, if it is already getting close to the time for your next scheduled administration, simply skip the missed one entirely. Consequently, you must never take extra medicine or double your dose to make up for a forgotten pill. On the other hand, taking too much of this medication can be extremely dangerous. In the unfortunate event of an overdose, a person might experience severe drowsiness, intense nausea, and vomiting. Furthermore, extreme cases can lead to uncontrolled muscle movements or sudden seizures and convulsions, which require immediate emergency medical attention.How to take Hydroxyzine correctly
Optimal administration and dosing schedule
Taking the medicine exactly as directed helps you get the best results while avoiding unwanted side effects. For the solid forms, it is best to swallow the tablets whole with a large glass of water, either with or without food. Should you experience a slightly upset stomach, a light meal or a glass of milk can often provide relief. On the other hand, if you are using the liquid oral suspension, you must shake the bottle thoroughly right before every single use. Furthermore, always measure your liquid medicine using a proper medical syringe, a specialised dosing spoon, or a designated medicine cup. Consequently, if you do not have an accurate measuring device at home, you should ask your pharmacist to provide one. Finally, if the primary goal of the treatment is to help you sleep, make sure to take the dose one to two hours before bed to prevent feeling groggy the next morning.Safe withdrawal and long-term management
For those who have used this medication daily for several months, it is crucial that you do not stop the treatment suddenly. Abruptly ending your course can cause your anxiety or sleep problems to return even worse, alongside uncomfortable headaches and shaking. Therefore, slowly lowering your dose over time safely helps your receptors adjust back to normal levels.- Timing your doses: Try to take your medicine at the same times every day to keep a steady balance in your system.
- Missed doses: If you forget a dose, take it as soon as you remember. However, if it is almost time for your next scheduled dose, simply skip the missed one.
- Duration of use: This medicine is intended for short-term relief, and its use for longer than four months has not been formally studied. Moreover, you must contact a doctor if your anxiety symptoms do not improve at all, or if they actually start to get worse during the treatment.
- Allergy testing: Stop taking the medicine at least 5 to 7 days before any skin prick tests, otherwise the test results will show false negatives.
Side effects and safety
It is essential to understand its safety guidelines before starting. First and foremost, you must never use this treatment if you have a known allergy to it, or to similar antihistamines like cetirizine or levocetirizine. Furthermore, it is strictly prohibited if you suffer from Long QT syndrome. Finally, women who are pregnant or breastfeeding must avoid this medicine, as it is contraindicated in pregnancy and breastfeeding.Common side effects
Because this medicine deeply relaxes the nervous system and naturally dries out bodily fluids, it causes a few standard reactions. These typical symptoms usually improve after the first few days as your body adjusts to the treatment. The most frequent issues include:- Somnolence, meaning you might feel very sleepy, fatigued, or sluggish.
- Occasional headaches throughout the day.
- Experiencing a dry mouth or slightly blurry vision.
- Developing a mild, uncomplicated skin rash.
Serious cardiac and neurological risks
The most serious safety concern involves the electrical rhythm of your heart, specifically a dangerous condition called QT prolongation. Therefore, you must stop taking the drug and call a doctor immediately if you notice any of the following:- A fast, irregular, or pounding heartbeat.
- A severe headache that is accompanied by chest pain.
- Extreme dizziness that leads to fainting spells.
- Unexpected seizures or sudden convulsions.
Metabolic changes and risks for older adults
While the medicine does not directly alter your internal metabolism, the deep relaxation it provides might lead to decreased physical activity and a slight increase in appetite. Meanwhile, older adults must exercise extra caution. In elderly patients, side effects such as profound drowsiness and severe mental confusion are significantly more common, which naturally increases the dangerous risk of falls.Emergency medical situations
- Severe allergic reactions: Seek immediate emergency care if you experience sudden hives, severe difficulty breathing, or noticeable swelling around your face, lips, tongue, or throat.
- Dangerous skin reactions: Stop using the medication right away and consult a doctor if you develop a rapidly spreading red rash that features blistering, peeling skin, or white and yellow pustules.
Drug interactions and clinical comparisons
Combined CNS depression and alcohol
This medicine can react badly with other drugs. It can make side effects worse or cause dangerous health issues. The most important rule is to avoid mixing it with central nervous system (CNS) sedatives. This includes anything that makes you sleepy. Combining it with alcohol or sleeping pills causes extreme drowsiness. It may also slow down your breathing to dangerous levels (respiratory depression).Cardiac safety and CYP3A4 inhibitors
You must avoid medicines that affect your heart's electrical rhythm, as hydroxyzine can increase the risk of QT prolongation. This includes certain macrolide antibiotics or specific heart medications. Furthermore, fresh grapefruit juice acts as a potent CYP3A4 inhibitor. This juice stops your liver from breaking the medicine down. This causes the drug to build up in your blood, leading to severe side effects and increased toxicity risk.Hydroxyzine vs benzodiazepine alternatives
Many users compare hydroxyzine to benzodiazepines such as alprazolam or diazepam. Unlike those drugs, hydroxyzine is not a controlled substance and carries a much lower risk of dependence and withdrawal symptoms. While benzodiazepines work faster on GABA receptors, Hydroxyzine provides a gentler calming effect through the serotonin system.Comparison with Z-Drugs and sleep aids
The medication is also frequently compared to Z-drugs like Zolpidem for sleep. Hydroxyzine is sometimes chosen because of its antihistamine and anticholinergic properties. These effects treat both the racing mind and physical itching simultaneously. Consequently, it provides a more versatile solution for patients with multiple symptoms without the risk of "sleep-walking" side effects.| Mixing substance | Interaction character | Safety strategy |
|---|---|---|
| Alcohol (all types) | Severe potentiation of sedation | Complete avoidance to prevent respiratory depression |
| Opioids / painkillers | High risk of combined CNS depression | Avoid combining or use extremely low doses |
| Grapefruit juice | CYP3A4 metabolic blockage | Switch to orange or apple juice to prevent toxicity |
| Sertraline / SSRIs | Potential for additive drowsiness | Monitor energy levels and adjust timing |
| Class IA/III antiarrhythmics | Increased risk of QT prolongation | Strict avoidance to protect heart rhythm |
Availability and delivery
While this medication is available to order from our online pharmacy without a prescription, providing a convenient and confidential way to manage symptoms of anxiety or itching, it is strongly recommended to consult with a doctor before starting treatment. Seeking professional medical advice ensures the correct dosage for your specific needs and helps you avoid potential side effects, such as extreme drowsiness or dry mouth, ensuring your path to recovery is both safe and effective.| UK distribution zones | Key cities and metropolitan areas | Delivery time |
|---|---|---|
| London & South East England | London, Brighton, Reading, Southampton, Portsmouth, Oxford | 9–21 days |
| South West & West Midlands | Bristol, Plymouth, Birmingham, Coventry, Wolverhampton, Stoke-on-Trent | 9–21 days |
| East Midlands & East of England | Nottingham, Leicester, Norwich, Cambridge, Peterborough, Derby | 9–21 days |
| North West & North East England | Manchester, Liverpool, Newcastle, Sunderland, Middlesbrough, Preston | 9–21 days |
| Yorkshire and the Humber | Leeds, Sheffield, Hull, Bradford, York, Huddersfield | 9–21 days |
| Scotland (Highlands & Lowlands) | Edinburgh, Glasgow, Aberdeen, Dundee, Inverness, Perth | 9–21 days |
| Wales & Northern Ireland | Cardiff, Swansea, Newport, Belfast, Derry, Lisburn | 9–21 days |
