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n. Plural form of ion.

"For the patient presenting with hyperthermia, traditional treatment may include external cooling to decrease temperature or pancuronium to decrease muscle hyperactivity. 4,6 Dantrolene sodium has been used to directly relax skeletal muscle rigidity by inhibiting the release of calcium ions from the sarcoplasm reticulum6 In severe hypertension, CNS stimulation should be avoided."

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