Prescribing Advice for GPs

An NHS Prescribing Advisers' Blog

Dust mite control ineffective for asthma

The Cochrane Library has published a review of house dust mite control measures for asthma. The review aimed to assess the efficacy of reducing dust mite allergen levels with the intention of reducing asthma symptoms.

The review included forty-nine trials including 2,733 patients that assessed both physical and chemical methods of controlling dust mite allergen levels. There were no statistical differences in morning peak flow, number of patients reporting improved symptoms, asthma symptom scores or medication usage.

The authors conclude that, "chemical and physical methods aimed at reducing exposure to house dust mite allergens cannot be recommended". The results of the review have reached the general media (BBC).

Action: Clinicians should ensure that advice given to patients with asthma is updated with the recommendations of this review. Dust mite control measures should not be recommended or endorsed.

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