T49.6X4 - Poisoning by otorhinolaryngological drugs and preparations, undetermined T49.6 - Poisoning by, adverse effect of and underdosing of otorhinolaryngological drugs and preparations T49.6X - Poisoning by, adverse effect of and underdosing of otorhinolaryngological drugs and preparations T49.6X4 - Poisoning by otorhinolaryngological drugs and preparations, undetermined