<prompt> Anaesthetic agent contraindicated in porphyria a Thiopentoneb Propofolc Ketamined Etomidale e Methadoneadcacab  <response>: 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. 