Amends the School Code. In provisions concerning the administration of asthma medication, epinephrine injectors, opioid antagonists, and oxygen, provides that "trained personnel" includes athletic coaches and trainers. Allows a pupil with asthma to self-administer and self-carry the pupil's asthma medication at a school-sponsored athletic practice or game. Allows a school nurse or trained personnel to administer undesignated asthma medication to a person at a school-sponsored athletic practice or game. Requires a school district, public school, charter school, or nonpublic school to maintain a supply of asthma medication in a secure location that is accessible before, during, and after school where a person is most at risk on account of physical activity. Requires at least one member of an athletic coach's staff at a school and any athletic trainers at that school to complete the training curriculum relating to the administration of undesignated asthma medication.