Safety of Montelukast and Cetirizine During Breastfeeding

Medication Safety Profiles

• The European Respiratory Society recommends montelukast and cetirizine as safe to use during breastfeeding, with montelukast having strong evidence showing only 0.68% of the maternal dose reaches the infant, and cetirizine being one of the preferred antihistamines with extensive safety data 1, 2
• The American Academy of Pediatrics and European Respiratory Society endorse montelukast as safe for use during lactation, with the benefits of breastfeeding overwhelming any theoretical risk of exposure 1, 2
• Cetirizine is classified as "compatible" with breastfeeding by major guideline societies, including the European Respiratory Society 1

Antihistamine Use and Breastfeeding

• The European Respiratory Society and other guideline societies recommend cetirizine as a preferred antihistamine due to its established safety record 1, 3
• The 2005 NAEPP Expert Panel Report identifies cetirizine as a current second-generation antihistamine of choice for lactating women 4
• Antihistamines, such as cetirizine, may theoretically reduce milk production, and monitoring for changes in milk supply is recommended, particularly in the early postpartum period 1

Combined Medication Use

• Both montelukast and cetirizine can be used simultaneously during breastfeeding if clinically indicated for asthma and allergic rhinitis management, with montelukast providing effective asthma control and allergic rhinitis treatment, and cetirizine providing additional symptomatic relief for allergic rhinitis symptoms 1, 4