T42.8X4 - Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, undetermined T42.8 - Poisoning by, adverse effect of and underdosing of antiparkinsonism drugs and other central muscle-tone depressants T42.8X - Poisoning by, adverse effect of and underdosing of antiparkinsonism drugs and other central muscle-tone depressants T42.8X4 - Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, undetermined