Final answer:
Before administering an antileukotriene medication, the nurse would assess the patient for allergies to cellulose, povidone, and chlorhexidine.
Step-by-step explanation:
Before administering an antileukotriene medication, the nurse would assess the patient for allergies to cellulose, povidone, and chlorhexidine. These substances are commonly used in medications and may cause allergic reactions in some individuals. It is important for the nurse to know if the patient has any allergies to these substances in order to prevent any adverse reactions.