A nurse is providing teaching to an adolescent who has a prescription for cromolyn for the management of asthma. Which of the following statements by the adolescent indicates an understanding of the teaching?

Choice A rationale Cromolyn is a mast cell stabilizer that works by inhibiting the release of inflammatory mediators like histamine from mast cells. This prophylactic action requires consistent, daily use to build up therapeutic levels and prevent the initiation of the asthmatic response, rather than acting as a rescue medication during an acute attack. Choice B rationale Using cromolyn as soon as one feels like wheezing is incorrect because cromolyn is not a bronchodilator and does not provide immediate relief for acute bronchospasm. Its mechanism of action involves stabilizing mast cells, which prevents the degranulation and release of inflammatory mediators, thus preventing symptoms from occurring. Choice C rationale Expecting to feel better in a week is an inappropriate timeframe for assessing cromolyn's efficacy. The full prophylactic benefits of cromolyn may take several weeks of consistent use to become apparent. Patients should be educated on the preventative nature and delayed onset of action. Choice D rationale While cromolyn can be used prophylactically before exercise, using it 2 hours before playing softball is not the recommended timing. For exercise-induced bronchospasm, cromolyn is typically administered 15 to 30 minutes prior to the activity to allow for adequate absorption and mast cell stabilization before exertion.