T39.2X1 - Poisoning by pyrazolone derivatives, accidental (unintentional) T39.2 - Poisoning by, adverse effect of and underdosing of pyrazolone derivatives T39.2X - Poisoning by, adverse effect of and underdosing of pyrazolone derivatives T39.2X1 - Poisoning by pyrazolone derivatives, accidental (unintentional)