Free Medical Coding > ICD10 CM > 2024 ICD-10-CM Codes > 2024 ICD-10-CM Codes S00-T88 – Injury, poisoning and certain other consequences of external causes (S00-T88) > 2024 ICD-10-CM Codes T36-T50 – Poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances (T36-T50) > 2024 ICD-10-CM Codes T42 – Poisoning by, adverse effect of and underdosing of antiepileptic, sedative- hypnotic and antiparkinsonism drugs (T42) > 2024 ICD-10-CM Codes T42.3 – Poisoning by, adverse effect of and underdosing of barbiturates > 2024 ICD-10-CM Codes T42.3X – Poisoning by, adverse effect of and underdosing of barbiturates (T42.3X) > 2024 ICD-10-CM Codes T42.3X5 – Adverse effect of barbiturates