Anaphylaxis is caused by: (A) N2O, (B) Althesin, (C) Halothane, (D) Propofol
Answer is B. AlthesinAlthesis is a neurosteroidIt was used as a parenteral anaestheticIt was withdrawn from the market because of several severe anaphylactic reactions(Refer: Morgan and Mikhail's Clinical Anaesthesiology, 5th edition)