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Cetirizine tablets

  • Overview


Information specific to: Cetirizine tablets.

About Cetirizine tablets and how it works

This medicine is used to treat allergic conditions such as allergic rhinitis, hay fever, and urticaria. It belongs to a group of medicines called antihistamines. These medicines block the action of a chemical in the body called histamine. This helps reduce the symptoms of allergies such as redness, itching and swelling.

This medicine is available as tablets which are taken by mouth.

Antihistamines affect allergy skin tests and you should stop taking this medicine for at least three days before you have the test.

Speak to your doctor if your symptoms do not improve or if they get worse during treatment with this medicine.

Before using Cetirizine tablets

This medicine may not be suitable for everyone and some people must never have it. Check the leaflet that comes with your medicine to make sure that the medicine is suitable before having it.

Always get advice from a healthcare professional before having this medicine if:

  • you are allergic or sensitive to or have had a reaction to any of the ingredients in the medicine, to hydroxyzine or to piperazine derivatives
  • this medicine is for a child under six years of age
  • you have kidney problems
  • you have epilepsy or are at risk of convulsions

Medicines interactions

If you are taking or using more than one medicine they may interact with each other. Before taking this medicine consult your doctor or pharmacist if you are taking or have recently taken any other medicines including vitamins, supplements and herbal or complementary preparations.

The following medicines may interact with this medicine:

CNS depressants

Possible side effects of Cetirizine tablets

Most medicines can cause some side-effects but not everyone having the same medicine will get the same side-effects.

The following side-effects have been associated with people taking this medicine:

  • drowsiness
  • tiredness
  • CNS stimulation
  • headache
  • dizziness
  • agitation
  • dry mouth
  • stomach discomfort
  • convulsions
  • pain or difficulty urinating
  • eye or eyesight problems
  • liver problems
  • nausea
  • sore throat
  • diarrhoea
  • blood problems
  • hypersensitivity reactions
  • anaphylactic shock
  • aggression
  • confusion
  • depression
  • hallucinations
  • memory problems including memory loss
  • insomnia
  • tics
  • paraesthesiae
  • movement disorder
  • taste changes
  • fainting
  • tremor
  • faster heart rate
  • itching
  • rash
  • urticaria
  • angioedema
  • inability to control urination
  • general feeling of being unwell
  • weakness
  • oedema
  • weight increase

If you experience other side effects or have any other worrying symptoms while you are taking this medicine, seek medical advice.

Pregnancy and breast-feeding

If you are trying to become pregnant or are pregnant, or are breast-feeding you should seek medical advice before taking this medicine.

Other important information

Make sure that you read the leaflet that comes with your medicine to check what dose you should take and if there is anything that you need to do if you take more than the recommended dose. If you are in any doubt about whether this medicine is suitable for you, speak to your doctor or pharmacist.

This medicine may affect your ability to drive or operate machinery. Do not drive or operate machinery until you know how this medicine affects you.

This medicine may interact with alcohol. It is best to avoid alcoholic drinks while you are taking this medicine.

Keep all medicines out of the sight and reach of children.

This medicine may be available under brand names including:

Piriteze Allergy tablets

Benadryl One-A-Day tablets

Zirtek Allergy tablets



Content provided by Datapharm