ISOFLURANE IS A VOLATILE HALOGENATED ANAESTHETIC ADMINISTERED BY INHALATION. IT HAS ANAESTHETIC ACTIONS SIMILAR TO THOSE OF HALOTHANE. ENFLURANE HAS A MINIMUM ALVEOLAR CONCENTRATION (MAC) VALUE RANGING FROM ABOUT 1.05% IN THE ELDERLY TO ABOUT 1.87% TO INFANTS. IT IS NON-FLAMMABLE AND IS NOT EXPLOSIVE WHEN MIXED WITH OXYGEN AT NORMAL ATMOSPHERIC PRESSURE. IT SUPPRESSES SALIVARY, BRONCHIAL, AND GASTRIC-SECRETIONS AND DILATED THE BRONCHIOLES.