As with other agents of this type, halothane anaesthesia has been shown to trigger a skeletal muscle hypermetabolic state leading to high oxygen demand and the clinical syndrome known as malignant hyperthermia (MH). The syndrome includes non specific features such as hypercapnia , muscle rigidity, tachycardia , tachypnoea, cyanosis , arrhythmias and unstable blood pressure . An increase in overall metabolism may be reflected in an elevated temperature. Treatment includes discontinuation of triggering agents, administration of intravenous dantrolene sodium and application of supportive therapy .
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