Can asthma meds cause asthma?

Unfortunately, yes: Many medicines can cause asthma as a side effect, (airway tightness rather). The most known for that are the LABAs (Long Acting Beta Agonists) meant for long term control of asthma and for airways to remain open for a longer period, but unfortunately led in some patients, especially during an asthma flare, to a paradoxical effect: airway tightening!! Hence the black box warning by the FDA