However, the causes of AR are complex and diagnosis is not straight-forward, meaning there exists a risk for underdiagnosis。 Moreover, the general belief flu-like symptoms do not warrant medical attention leads patients to choose over-the-counter medicines rather than to visit a doctor。 Despite the fact there may be more cost-effective ways of treating AR in the long-term, antihistamines are the most commonly used medicine in the treatment of allergies (Kuna, 2016).
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