Zafar Ali Sayed, Zubair Shaheen.
Drug resistant (refractory) Asthma current understanding & recommendations.
Pak J Chest Med Jan ;9(2):3-12.

Although severe, refractory asthma is an uncommon disease (likely < 5% of total asthma), it is poorly understood and, therefore, often frustrating to treat. The cost of treatment for this group of asthma patients is also very high. This article will serve to define, understand, and manage these refractory patients.

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