The text aims to enable a healthcare professional prescribing or dispensing asthma inhalers to be confident and competent in the correct use of inhalers, thus improving treatment effectiveness and cutting down treatment costs. There is self assessment questions at the end of the text designed to assess ability to answer common patient questions about asthma inhalation devices. This guide would be of interest to pharmacists, pharmacy technicians, preregistration pharmacy trainees and asthma nurses.