Anaesthetic agent contraindicated in porphyria – a) Thiopentoneb) Propofolc) Ketamined) Etomidale e) Methadone
High-Yield Explanation
Barbiturates (Thiopentone) are absolutely contraindicated in prophyria.
Note : Reports about safety of etomidate in prophyria are conflicting. Some books (Miller 7th /e p. 1115) consider it safe and other books (Lee, Wylie) consider it unsafe.