This present disclosure relates to a method of treating autoimmune, respiratory and/or inflammatory diseases or conditions, e.g., asthma, COPD, rheumatoid arthritis and idiopathic Pulmonary Fibrosis (IPF). The method comprises administering a dual PI3K delta and gamma inhibitor and a corticosteroid. The present invention also relates to pharmaceutical compositions containing a dual PI3K delta and gamma inhibitor and a corticosteroid.