T50.906 - Underdosing of unspecified drugs, medicaments and biological substances T50.9 - Poisoning by, adverse effect of and underdosing of other and unspecified drugs, medicaments and biological substances T50.90 - Poisoning by, adverse effect of and underdosing of unspecified drugs, medicaments and biological substances T50.906 - Underdosing of unspecified drugs, medicaments and biological substances