Some antihistamines are OK with BF.

Breastfeeding and medications

quote "Allergies and hayfever

While breastfeeding, it is best to treat the individual symptoms of hayfever and allergy separately.

For eye symptoms, use eye drops (those containing antazoline or naphazoline). For nasal symptoms, use nasal sprays (such as beclomethasone, budesonide or fluticasone).

If needed, you may use ‘sedating’ antihistamines like chlorpheniramine, cyprohetadine, dexchlorpheniramine, doxylamine or pheniramine. If you are using them for a long period, you will need to monitor your baby for symptoms such as drowsiness and prolonged sleep.

Less-sedating antihistamines such as cetirizine or fexofenadine are not recommended due to the lack of safety information. If you need a less-sedating antihistamine, consider loratadine or desloratadine, as there is more experience with their use. "

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