Circassia Pharmaceuticals plc is a specialty biopharmaceutical company focused on allergy and respiratory diseases. The Company operates through three segments: Allergy, which relates to a range of immunotherapy development products for the treatment of allergy; NIOX, which relates to the portfolio of products used to improve asthma diagnosis and management by measuring fractional exhaled nitric oxide (FeNO), and Respiratory, which relates to the portfolio of asthma and chronic obstructive pulmonary disease product candidates. Its next-generation immunotherapy is in Phase III testing for cat allergy. Its lead asthma treatment targets substitution of GlaxoSmithKline's (GSK's) Flixotide pMDI. It is developing therapies targeting direct substitution of Seretide pMDI and Serevent pMDI. The Company is also developing a range treatment, including a fixed dose triple combination containing an inhaled corticosteroid, long-acting beta agonist and long-acting muscarinic antagonist.