<prompt> Absolute contraindication to thiopentone:CardiotoxicityAcute intermittent phorphyriaMalignant hyperthermiaMethhemoglobinemia  <response>: Ans. b Acute intermittent phorphyriaMust Know Thiopentone is CI in acute intermittent porphyria. Etomidate is CI in adrenal insufficiency. LA which causes meth hemoglobinemia: Prilocaine Malignant hyperthermia is caused by: Succinylcholine DOC for malignant hyperthermia: Dantrolene 