Loratadine: Uses, Side Effects and Precautions

Loratadine is an antihistamine. Most adults and children aged 2 and over can take it, but check the label for the right product and age.

What are the common side effects?

Drowsiness is the most common. Do not drive, cycle or use machinery until you feel fully alert. Headaches, tiredness and nervousness can also occur, mainly in children.

Who should check first?

• People who have had an allergic reaction to it or another medicine
• People with severe liver failure
• People with food additive allergies
• People with epilepsy or a raised risk of seizures
• People with an allergy test coming up, as it can affect results

When should I get help?

Speak to a doctor or pharmacist if side effects keep bothering you. Call triple zero (000) for sudden swelling of the lips, mouth, throat or tongue, trouble breathing, or fainting.

Doses vary, so follow your prescriber, pharmacist and the medicine label. In an emergency, call triple zero (000). For a possible overdose, call the Poisons Information Centre on 13 11 26.

Source: NHS: Who can and cannot take loratadine and NHS: Side effects of loratadine. General education does not replace individual medical advice. Updated November 2026.

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