Problems may start after medicine is given. A person may have:
- Fever higher than 105 degrees Fahrenheit (ºF) (40.6 degrees Celsius [ºC])
- Stiff muscles
- Muscle spasms, mainly in the face
- Fast breathing
- Fast or irregular heartbeat
- Dark urine
- An uneven skin color
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a (Malignant hyperpyrexia; Malignant Hyperthermia Susceptibility)
American Association of Neuromuscular and Electrodiagnostic Medicine http://aanem.org
Malignant Hyperthermia Association of the United States http://www.mhaus.org
Canadian Organization for Rare Disorders http://www.raredisorders.ca
Health Canada https://www.canada.ca
FAQs: General MH questions. Malignant Hyperthermia Association of the United States website. Available at: http://www.mhaus.org/faqs/category/frequently-asked-questions-about/about-mh/. Accessed December 3, 2019.
Malignant hyperthermia. American Association of Neuromuscular and Electrodiagnostic Medicine website. Available at: http://aanem.org/Patients/Disorders/Malignant-Hyperthermia. Accessed December 3, 2019.
Malignant hyperthermia. EBSCO DynaMed website. Available at: https://www.dynamed.com/condition/malignant-hyperthermia . Updated March 4, 2016. Accessed December 3, 2019.
Rosenberg H, Pollock N, et al. Malignant hyperthermia: a review. Orphanet J Rare Dis. 2015 Aug 4;10:93.