ICSs suppress inflammation in the lungs and are recommended for prophylactic treatment of asthma. Five corticosteroids are available as inhaled formulations for the treatment of asthma: beclometasone dipropionate, budesonide, fluticasone propionate, mometasone furoate and ciclesonide. Two of the ICSs are available in combination with a LABA in a single inhaler (fluticasone propionate in combination with salmeterol and budesonide in combination with formoterol fumarate). The budesonide/formoterol fumarate combination device may be used as part of a flexible dosing regimen; as adjustable maintenance dosing and as maintenance and reliever therapy in people aged 18 years and over. For further details of available products that are included in this appraisal please see appendix C.