• Relieves allergy symptoms within 1-2 hours of taking
  • Provides 24-hour relief with a single daily dose
  • Non-drowsy formula suitable for daytime use

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Overview

When hayfever or allergies flare up, the constant sneezing, itchy eyes, and blocked nose can make even simple daily tasks a struggle. Clarityn 10mg tablets provide powerful, non-drowsy relief that lasts all day — helping you stay focused, comfortable, and free to enjoy life without allergies getting in the way. Trusted for decades, Clarityn is one of the UK’s most popular antihistamines for fast, reliable relief.

This medicine requires a secure online consultation with a UK-registered prescriber, and will only be supplied if clinically appropriate.


What is Clarityn


Clarityn contains loratadine, a modern second-generation antihistamine that blocks histamine — the chemical behind common allergy symptoms like sneezing, runny nose, itchy eyes, and skin irritation.

It’s widely used to relieve seasonal hay fever (allergic rhinitis), year-round allergies triggered by dust, pets, or mould, and skin reactions such as hives (urticaria).

Clarityn starts working within 1–2 hours and provides up to 24 hours of protection from a single dose. Because it’s non-drowsy for most people, it’s suitable for daytime use, allowing you to stay clear-headed and get on with your day. With a proven safety record and years of trusted use, Clarityn is a reliable choice for effective allergy relief.

Directions

  • Adults and children aged 12+: One tablet daily with water
  • Can be taken with or without food
  • Take at the same time each day for consistent relief
  • Do not exceed the recommended dose
  • Always follow the advice of your prescriber.

Side Effects

Like all medicines, Clarityn (loratadine) can cause side effects, although not everyone will experience them. Most are mild, short-lived, and improve as your body adjusts.

 

Common (may affect up to 1 in 10 people):

  • Headache – mild headaches are fairly common and can usually be managed with hydration, rest, or simple pain relief if needed.
  • Sleepiness – although loratadine is generally classed as a “non-drowsy” antihistamine, some people may still feel sleepy. If this happens, avoid driving or operating machinery until you know how it affects you.
  • Dry mouth – you may notice a dry or uncomfortable feeling in your mouth. Drinking plenty of water or chewing sugar-free gum can help.
  • Fatigue – some people may feel more tired than usual while taking Clarityn. This effect is usually mild and temporary.

 

Less common (may affect up to 1 in 100 people):

  • Stomach upset – occasional abdominal discomfort may occur but usually passes quickly.
  • Nervousness – a small number of people may feel restless, anxious, or jittery.
  • Skin rash – mild rashes may appear in some cases, but they usually resolve on their own.

 

Rare but serious (seek urgent medical help):

  • Severe allergic reaction (anaphylaxis) – symptoms may include swelling of the face, lips, tongue or throat, difficulty breathing, or a sudden rash. This is very rare but requires immediate medical attention.

Most people tolerate Clarityn (loratadine) well, and side effects (if they do occur) are generally mild and temporary. If you are concerned about any symptoms, or they do not improve, speak to your doctor, pharmacist, or prescriber.

Disclaimer: This is not a complete list of side effects. Always read the patient information leaflet that comes with your medicine for full details. If you experience severe or worrying symptoms, seek medical advice straight away. In an emergency, call 999 or go to A&E.

Warnings

Clarityn may not be suitable if you:

  • Are allergic to loratadine or any of the ingredients
  • Have severe liver problems (dose adjustments may be required)
  • Are pregnant or breastfeeding (only use if advised by your prescriber)
Frequently asked questions
  • What is Clarityn and how does it work?

    Clarityn (loratadine) is a non-drowsy antihistamine that helps relieve allergy symptoms by blocking histamine, the chemical responsible for sneezing, itching and watery eyes. It provides 24-hour coverage and is commonly used for seasonal hay fever, indoor allergies and hives.

  • How long does Clarityn take to start working?

    Clarityn (loratadine) typically begins to work within one to three hours, offering relief that lasts throughout the day. Taking it consistently during allergy season helps maintain steady symptom control, especially when pollen levels are high.

  • What symptoms does Clarityn help relieve?

    Clarityn (loratadine) helps reduce sneezing, itchy eyes, runny nose, watery eyes and general allergic irritation. It also supports relief from indoor allergies such as dust mites and pet dander, making it effective for both seasonal and year-round symptoms.

  • Is Clarityn non-drowsy?

    Yes. Clarityn (loratadine) is classed as a non-drowsy antihistamine because it has a lower chance of causing sleepiness compared with older allergy tablets. A small number of people may still notice mild tiredness, so avoid driving if you feel affected.

  • Who should avoid using Clarityn?

    Clarityn (loratadine) may not be suitable if you have liver problems, take certain interacting medicines or are pregnant without clinical advice. Children under two years old should not use it unless instructed. Always speak to a clinician if unsure.

  • Can I take Clarityn with other hay fever medicines?

    Clarityn (loratadine) can be used alongside a steroid nasal spray such as mometasone for stronger symptom control. However, combining it with another oral antihistamine is rarely needed and may increase drowsiness. Always seek advice before taking multiple treatments.

  • Is Clarityn safe to use in pregnancy or breastfeeding?

    Clarityn (loratadine) is often considered one of the safer antihistamines during pregnancy, but you should always check with a clinician before starting. Small amounts can pass into breast milk, so individual assessment is important for breastfeeding parents.

  • Is Clarityn stronger or more effective than generic loratadine?

    Clarityn (loratadine) contains the same active ingredient and works in the same way as generic loratadine tablets. Some people prefer the branded version because they find the tablets easier to swallow or feel more confident using a known brand, but medically both options give equivalent allergy relief.

  • Can Clarityn help with allergies caused by pets or dust?

    Yes. Clarityn (loratadine) is effective for indoor allergens such as pet dander, dust mites and mould. Taking it daily helps control symptoms like itchy eyes, sneezing and runny nose, especially if exposure is frequent.

  • Does Clarityn help with skin allergies or hives?

    Clarityn (loratadine) can relieve itching, redness and irritation caused by hives or mild skin allergies because it blocks histamine’s effects on the skin. It won’t treat the underlying cause, but it often reduces discomfort while the reaction settles.

  • Can children take Clarityn safely?

    Yes. Clarityn (loratadine) is suitable for children aged two and over, depending on the formulation and dose. Children’s Clarityn syrup is often preferred for younger ages. Always follow age-specific dosing and speak to a pharmacist if symptoms persist.

  • Can Clarityn be taken alongside nasal sprays or eye drops?

    Yes. Clarityn (loratadine) can be safely combined with antihistamine eye drops or steroid nasal sprays when symptoms are more severe. This approach is helpful for people with heavy pollen allergies or mixed symptoms affecting both eyes and nose.

  • Why might Clarityn stop working during high-pollen days?

    Clarityn (loratadine) may feel less effective when pollen counts are extremely high, or when exposure is prolonged outdoors. This doesn’t mean the medicine has stopped working; it may simply need support from a nasal spray or eye drops during peak season.

  • Can Clarityn help with alcohol-related flushing or redness?

    Clarityn (loratadine) is not designed to treat alcohol flushing, which is usually caused by genetics rather than allergy. However, if alcohol triggers histamine release or worsens allergy symptoms, Clarityn may help reduce itch or redness.

  • What’s the best time of day to take Clarityn?

    Clarityn (loratadine) can be taken at any time of day, but many people prefer taking it in the morning to cover daytime symptoms. If you experience morning sneezing or early symptoms, taking your dose at night may work better.