IT IS NOT A POTENT ANALGESIC AND INDUCTION OF ANAESTHESIA WITH SAFE CONCENTRATIONS OF HALOTHANE IS DELAYED. INDUCTION AND RECOVERY ARE RAPID, AND DEPTH OF ANESTHESIA CAN BE RAPIDLY ALTERED. A HIGH CONCENTRATION (3% OR MORE) IS COMMONLY EMPLOYED FOR THE INDUCTION OF ANESTHESIA. RESPIRATION IS DEPRESSED BY ALL ANAESTHETIC CONCENTRATIONS OF HALOTHANE. IT OBTUNDS LARYNGEAL AND PHARYNGEAL REFLEXES TO A MARKED DEGREE, RELAXES THE MASTER MUSCLES, AND INHIBITS SALIVATION; THIS COMBINATION OF EFFECTS RENDERS TRACHEAL INTUBATION RELATIVELY SIMPLE. LARYNGOSPASM, BRONCHOSPASM, AND COUGHING ARE ALL INHIBITED.