T50.991 - Poisoning by other drugs, medicaments and biological substances, accidental (unintentional) T50.9 - Poisoning by, adverse effect of and underdosing of other and unspecified drugs, medicaments and biological substances T50.99 - Poisoning by, adverse effect of and underdosing of other drugs, medicaments and biological substances T50.991 - Poisoning by other drugs, medicaments and biological substances, accidental (unintentional)