Even certain medications can trigger asthma: aspirin and other non-steroid anti-inflammatory drugs, and beta-blockers (which are used to treat high blood pressure, heart conditions and migraine).

Low-dose aspirin should only be taken with caution by certain groups, including those with asthma, allergies, liver, kidney or digestive problems.

Aspirin can affect compounds involved in inflammation and the hyper-response of airways that is seen in asthma.