Duphacort Q Uses Dexamethasone is a synthetic corticosteroid with a potent anti-inflammatory action: Duphacort Q can be used for: 1.Intravenous therapy in cases where emergency treatment is indicated, particularly shock and circulatory collapse, fog fever, acute mastitis and burns. 2.Acetonaemia (ketosis) in cattle. Duphacort Q has a marked glucogenic action. 3.Inflammatory conditions in all species: Duphacort Q will suppress inflammation and is indicated in the treatment of arthritis, laminitis (excluding horses), dermatitis, etc.