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Pregnancy, breastfeeding and fertility while taking loratadine - Brand name: Clarityn

Loratadine and pregnancy

You can take loratadine in pregnancy.

Loratadine and breastfeeding

If you need to take an antihistamine and you're breastfeeding, loratadine is one of the best choices.

There is some information which shows that only very small amounts of loratadine get into breast milk. For many years it has been widely used while breastfeeding without causing any side effects in babies.

It's very rare for breastfed babies to have side effects from medicines you're taking. But it's important to keep monitoring your baby if you're taking any medicine while breastfeeding.

Contact your healthcare professional or call 111 as soon as possible if you notice that your baby:

  • is not feeding as well as usual
  • seems unusually sleepy or irritable

If your baby has any symptoms that are not listed, or you're worried about them, you can also call 111 or contact any healthcare professional.

Carry on taking the medicine and keep breastfeeding as usual until you’ve got advice about your baby’s symptoms.

Loratadine and fertility

There's no evidence to suggest that taking loratadine will reduce fertility in either men or women.

However, speak to a pharmacist or your doctor before taking it if you're trying to get pregnant.

Find out more about how loratadine can affect you and your baby during pregnancy on the Bumps (Best Use of Medicines in Pregnancy) website.

Page last reviewed: 22 April 2025
Next review due: 22 April 2028