Malignant hyperthermia is defined as a potentially fatal hypermetabolic syndrome characterized by hyperpyrexia, skeletal muscle rigidity, tachycardia, respiratory and metabolic acidosis, cyanosis etx. There is no simple noninvasive test to identify the susceptible individuals. A history of hyperpyrexia and/or muscle rigidity during previous general or a family history of such a condition provides the anesthesiologist with valuable information. Avoidance of potent inhalational anesthetic agents and other triggering agenta, and the selective use of regional anesthesia with either a local anesthetic agent or neuroleptic anesthesia, are the usual acceptable guidelines in the anesthetic management of susceptible individuals. Dentrolene sodium has been shown to be effective in the prevention and treatment of malignant hyperthermia in malignant hyperthermia susceptible swine. We gave Dantrolene sodium orally as a part of the prophylaxia for malignant hyperthermia in a 34yearts-old woman who underwent an emergency bilateral salpingectomy and who had a family history of malignant hyperthermia. We report on this patient with a family history of hyperthermia and reviewed the literature concerning malignant hyperthermia.