Fan, H.W.; Marcopito, L.F.; Cardoso, J.L.; França, F.O.; Malaque, C.M.; Ferrari, R.A.; Theakston, R.D.; Warrell, D.A. Sequential randomised and double blind trial of promethazine prophylaxis against early anaphylactic reactions to antivenom for bothrops snake bites.BMJ1999,318...