Anaesthetic agent contraindicated in porphyria – a) Thiopentoneb) Propofolc) Ketamined) Etomidale e) Methadone: (A) ad, (B) c, (C) ac, (D) ab
Answer is A. 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.