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Clarityn Allergy 10 mg tablets – patient leaflet, side effects, dosage

Last updated: · Text from the MHRA, as of · About this document

Medicine status: No prescription needed Details

Medicine strength:
10 mg
Contains active substance:
ATC code:

Patient leaflet - Clarityn Allergy 10 mg tablets

1. WHAT CLARITYN ALLERGY TABLETS ARE AND WHAT THEY ARE USED FOR The full name of your medicine is Clarityn Allergy 10 mg Tablets.

What Clarityn Allergy Tablets are

Clarityn Allergy Tablets contain the active substance loratadine which belongs to a class of medicines called “antihistamines”.

How Clarityn Allergy Tablets work

Clarityn Allergy Tablets help to reduce your allergy symptoms by stopping the effects of a substance called “histamine”, which is produced in the body when you are allergic to something.

When Clarityn Allergy Tablets should be taken

Clarityn Allergy Tablets relieves symptoms associated with allergic rhinitis (for example, hay fever), such as sneezing, runny or itchy nose, and burning or itchy eyes.

Clarityn Allergy Tablets may also be used to help relieve symptoms of urticaria (itching and redness) which is often known as hives or nettle rash. The effect of Clarityn Allergy Tablets will last a whole day and should help you to continue your normal daily activities and sleep.

You must talk to a doctor if you do not feel better or if you feel worse.

2. WHAT YOU NEED TO KNOW BEFORE YOU TAKE CLARITYN ALLERGY TABLETS

Do not take Clarityn Allergy Tablets if:

  • You are allergic (hypersensitive) to loratadine or any of the other ingredients of this medicine (listed in section 6).
  • You are pregnant or breastfeeding

    Warnings and precautions

    Talk to your doctor, pharmacist or nurse before taking Clarityn Allergy Tablets if:

    • You have liver disease.
    • You are scheduled to have any skin tests for allergies. Do not take Clarityn Allergy Tablets for two days before having these tests. This is because it may affect the test results. If any of the above apply to you (or you are not sure), talk to your doctor, pharmacist or nurse before taking Clarityn Allergy Tablets.

Children

Do not give Clarityn Allergy Tablets to children younger than 6 years old or to children who weigh 30 kg or less. There are other formulations more suitable for children younger than 6 years or with a body weight of 30 kg or less.

Children under 2 years of age:

The safety and efficacy of Clarityn Allergy Tablets have not been established. No data are available. Other medicines and Clarityn Allergy Tablets

The side effects of Clarityn Allergy Tablets may increase when used together with medicines that alter the performance of some enzymes responsible for drug-metabolism in the liver. However, in clinical studies, no increase in side effects of loratadine was seen with products that altered the performance of these enzymes. Tell your doctor, pharmacist or nurse if you are taking, have recently taken or might take any other medicines. This includes medicines taken without a prescription.

Clarityn Allergy Tablets with alcohol

Clarityn Allergy Tablets have not been shown to add to the effects of an alcoholic drink. Pregnancy and breast-feeding

If you are pregnant, think you may be pregnant or are planning to have a baby, ask your doctor or pharmacist for advice before taking this medicine. As a precautionary measure, it is preferable to avoid the use of Clarityn Allergy Tablets during pregnancy.

Do not take Clarityn Allergy Tablets if you are breast-feeding. Loratadine is excreted in breast milk. Driving and using machines

In clinical trials that assessed driving ability, no impairment was observed in patients receiving loratadine. At the recommended dose, Clarityn Allergy Tablets are not expected to cause you to be drowsy or less alert. However, very rarely some people experience drowsiness, which may affect their ability to drive or use machines.

Clarityn Allergy Tablets contains lactose

Clarityn Allergy Tablets contains lactose; thus if you have been told by your doctor that you have an intolerance to some sugars, contact your doctor before taking this medicine.

3. HOW TO TAKE CLARITYN ALLERGY TABLETS

Always take this medicine exactly as described in this leaflet or as your doctor, pharmacist or nurse has told you. Check with your doctor, pharmacist or nurse if you are not sure.

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The score line of the tablet is only there to help you break the tablet if you have difficulty swallowing it whole.

Giving this medicine to children

It is important to know how much your child weighs to make sure that you give the correct amount of medicine. For example, a 9 year old child weighs about 30kg (4st 7lb). If in doubt weigh your child and then follow the instructions in the table. Do not give to children who weigh 30 kg (4st 7lb) or less. There are other formulations more suitable for children younger than 6 years or with a body weight of 30 kg or less. Not recommended for children under 2 years old.

How much to take:

If you take more Clarityn Allergy Tablets than you should

If you take more Clarityn Allergy Tablets than you should, talk to your doctor or pharmacist straight away. No serious problems are expected however, you may get a headache, have a rapid heartbeat or feel sleepy.

If you forget to take Clarityn Allergy Tablets

  • If you forget to take your dose, take it as soon as you remember, then continue to take it as usual.
  • Do not take a double dose to make up for a forgotten dose.

If you have any further questions on the use of this product, ask your doctor, pharmacist or nurse.

4. POSSIBLE SIDE EFFECTS

Like all medicines, this medicine can cause side effects, although not everybody gets them. The most commonly reported side effects in adults and children over 12 years of age are:

  • drowsiness
  • headache
  • increased appetite
  • difficulty sleeping.

The most commonly reported side effects in children aged 2 to 12 years are:

  • headache
  • nervousness
  • tiredness

The following very rare side effects (may affect up to 1 in 10,000 people) have also been seen during the marketing of loratadine:

  • severe allergic reaction (including swelling)
  • dizziness
  • convulsion
  • fast or irregular heartbeat
  • nausea (feeling sick)
  • dry mouth
  • upset stomach
  • liver problems • hair loss
  • rash
  • tiredness

The frequency of the following side effect is not known:

  • weight gain

    Reporting of side effects

    If you get any side effects, talk to your doctor, pharmacist or nurse. This includes any possible side effects not listed in this leaflet. You can also report side effects directly (see details below). By reporting side effects you can help provide more information on the safety of this medicine. United Kingdom: Yellow Card Scheme Website: www.mhra.gov.uk/yellowcard

    Malta: ADR Reporting, The Medicines Authority, Post-Licensing Directorate, 203 Level 3, Rue D'Argens, GŻR-1368 Gżira Website:

    www.medicinesauthority.gov.mt, e-mail: postlicensing.medicinesauthority@gov.mt

5. HOW TO STORE CLARITYN ALLERGY TABLETS

  • This medicinal product does not require any special storage conditions.
  • Keep this medicine out of the sight and reach of children.
  • Do not use this medicine after the expiry date which is stated on the blister after Exp. The expiry date refers to the last day of the month.
  • Do not use this medicine if you notice any change in the appearance of the tablet.
  • Do not throw away any medicines via wastewater or household waste. Ask your pharmacist how to throw away medicines you no longer use. These measures will help to protect the environment.

6. CONTENTS OF THE PACK AND OTHER INFORMATION What Clarityn Allergy Tablets contain

  • The active substance is loratadine. Each tablet contains 10 mg loratadine.
  • The other ingredients are lactose monohydrate, maize starch, magnesium stearate. What Clarityn Allergy Tablets looks like and contents of the pack

Clarityn Allergy tablets are white, to off-white, oval tablets with a score on one side and plain on the other side.

Clarityn Allergy tablets are available in pack sizes of 7, 10, 14, 20, 30, or 60 tablets.

Not all pack sizes may be marketed.

Marketing Authorisation Holder and Manufacturer

Marketing Authorisation Holder:

Bayer plc

400 South Oak Way

Reading

RG2 6AD

United Kingdom

Manufacturer:

Bayer Bitterfeld GmbH

OT Greppin

Salegaster Chaussee 1

06803 Bitterfeld-Wolfen

Germany

This leaflet was last revised in July 2018.

Age and weight

Adults and children 6 years and older who weigh more than 30kg (4st 7lb)1 x tabletOnce daily
Children who weigh 30kg (4st 7lb) or lessNot recommended.

If you have severe liver problems your doctor or pharmacist may advise you to take the recommended amount every other day. If this applies to you follow their instructions.

How much to take

How often to take

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About this document

Source: MHRA - Medicines and Healthcare products Regulatory Agency (products.mhra.gov.uk) · Marketing authorisation: PL 00010/0657

Last revision stated in the text: July 2018 · MHRA data as of 13 October 2026

Found a mistake? Tell us on the contact page.

The information on this site does not replace the advice of a doctor or pharmacist.

Facts about Clarityn Allergy 10 mg tablets

Prescription needed? Depends on the pack size: general sale list (GSL) – also sold outside pharmacies, pharmacy medicine (P) – sold only in pharmacies
Active substance Loratadine
Strength 10 mg
Pharmaceutical form Oral tablet
The score line of the tablet is only to facilitate breaking for ease of swallowing and not to divide into equal doses.
How is it taken Oral
Excipients Lactose Monohydrate, Maize Starch, Magnesium Stearate
Pack sizes 10 tablet, 20 tablet, 30 tablet, 60 tablet
Is it available? Listed as available (NHS Dictionary of Medicines and Devices – not a record of current supplies)
Shelf life 36 months.
Storage This medicinal product does not require any special storage conditions.
Drug group (ATC) Antihistamines – H1 antagonist
  1. R Respiratory system drugs
    1. R06 Antihistamines for systemic use
      1. R06A Antihistamines for systemic use
        1. R06AX Other antihistamines for systemic use
          1. R06AX13 loratadine
Marketing authorisation PL 00010/0657 (first authorised 10 June 1992)
Marketing authorisation holder Bayer plc
Codes GTIN 5010605400766, 5010605400773, 5010605403163, 5010605403170 · BNF 03040100

Sources: the MHRA product information (products.mhra.gov.uk) and the NHS Dictionary of Medicines and Devices (dm+d), release 10.1.0 of 12 October 2026, NHS Business Services Authority. Contains public sector information licensed under the Open Government Licence v3.0.