Global anti-asthma drugs market Information, by type of asthma (allergic (extrinsic) and non-allergic (intrinsic) asthma), by asthma trigger type (child-onset asthma, adult-onset asthma, exercise-induced asthma, cough-induced asthma, occupational asthma, nocturnal asthma, steroid-resistant asthma (severe asthma)), by drug class (bronchodilators (beta agonists, anti-cholinergics, xanthines), leukotriene antagonists, mast cell stabilizers, corticosteroids, monoclonal antibody), by therapy (reliever treatment and maintenance treatment) and by route of administration (oral, inhaled, intravenous, subcutaneous)- Forecast to 2022