Medication Use During Pregnancy

Asthma Management

The American Academy of Allergy, Asthma, and Immunology recommends montelukast for recalcitrant asthma during pregnancy, particularly in patients who have shown favorable response prior to pregnancy 2
Montelukast can be continued or initiated for recalcitrant asthma during pregnancy, particularly in patients who have shown favorable response prior to pregnancy 2
Inhaled medications have been used for many years without documented adverse effects on the fetus, making them preferred first-line options for asthma control 2, 4
Poorly controlled asthma poses greater risks to maternal and fetal health than medication use 2

The American Academy of Allergy, Asthma, and Immunology recommends avoiding levocetirizine during the first trimester if possible 1
Cetirizine and loratadine have more accumulated safety data than levocetirizine and should be preferred 1
For antihistamine treatment during pregnancy, chlorphenamine, cetirizine, or loratadine are preferred due to their established safety records 1
Intranasal corticosteroids or sodium cromolyn may be preferred options for allergic rhinitis during pregnancy 1, 2

About 1% of montelukast passes into breast milk, but extensive metabolism and plasma protein binding are thought to limit infant exposure 2
Excretion of montelukast into breast milk is very low 3
For nursing mothers using montelukast, the benefits of breastfeeding generally outweigh the risk of exposure; consider breastfeeding prior to medication intake to further limit exposure 2

Limited data suggest no significantly increased risk of malformations with montelukast use during pregnancy, but the number of exposed women is insufficient to ensure complete safety for the fetus 3
When considering medication use during pregnancy, balance maternal risk of therapy versus no therapy and the fetal risk of uncontrolled maternal disease with the risk of therapy on the newborn 4
Assuming all antihistamines have equivalent safety profiles during pregnancy is a common pitfall 1
Regular monitoring of asthma control is essential during pregnancy 2