Avoiding triggers

Triggers for asthma vary widely and differ between patients. Possible triggers for asthma are listed in Triggers for exacerbations of existing asthma.

Table 1. Triggers for exacerbations of existing asthma

Action

Trigger

Always avoid

cigarette smoke

Avoid or minimise if possible

allergens (eg pollen, dust mite)

airborne or environmental irritants (eg cold or dry air, occupational irritants, pollution, smoke)

drugs associated with asthma exacerbations (eg NSAIDs for patients with aspirin-exacerbated respiratory disease, beta blockers [NB1])

dietary triggers (either temperature related [eg cold drinks] or allergy related [for patients with food allergies]) [NB2]

Manage

respiratory tract infections

comorbidities (eg allergic rhinitis, gastro-oesophageal reflux, nasal polyposis, obesity, inducible laryngeal obstruction)

physiological and psychological changes (extreme emotions, hormonal changes, pregnancy, sexual activity)

Note:

NSAID = nonsteroidal anti-inflammatory drug

NB1: If a patient with asthma develops an indication for beta-blocker therapy (eg heart failure, myocardial infarction), start beta-blocker therapy at a low dose under supervision.

NB2: Food allergies rarely trigger acute asthma; however, a confirmed food allergy is a risk factor for asthma-related death.