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Pregnancy: Animal studies do not indicate harmful effects with respect to effects on pregnancy or embryonal/foetal development. However must not use during pregnancy only if it is considered to be clearly essential.
Breast-Feeding: Cetirizine, the racemate of levocetirizine, has been shown to be excreted in human. Therefore, the excretion of levocetirizine in human milk is likely. Adverse reactions associated with levocetirizine may be observed in breastfed infants. Therefore, caution should be exercised when prescribing levocetirizine to lactating women. It is unknown whether montelukast is excreted in human milk. Studies in rats have shown that montelukast is excreted in milk. Montelukast may be used in breast-feeding only if it is considered to be clearly essential.
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