Ciclosporin is a cyclic polypeptide that has been used widely as an orally-available immunosuppressant.[1] It was originally used to prevent transplant rejection of solid organs but has also found use as an orally administered agent to treat psoriasis,[2]rheumatoid arthritis,[3]dry eye[4] and other auto-immune related conditions. A variety of pre-clinical and clinical studies have been and are investigating its use to treat lung-related disorders via inhalation.