Poisoning by antipruritics, intentional self-harm, init

This code signifies a patient presenting with adverse effects from intentionally self-administering antipruritic medications (drugs used to relieve itching) with the intent to harm themselves. The poisoning is acute, and the patient is in the initial phase of receiving active treatment for the toxic effects.

Apply this code when a patient is admitted to the emergency department or inpatient setting due to an overdose of an antipruritic, such as diphenhydramine or hydroxyzine, and a psychiatric evaluation confirms the overdose was a deliberate act of self-harm. This code is appropriate for the initial hospitalization or encounter where the poisoning is being actively managed.

• Always sequence this code as the primary diagnosis when the poisoning is the reason for the encounter.
• Requires an additional code for the specific antipruritic drug if known (e.g., from the T36-T50 range, if more specific than T49.1X2A).
• Do not use for accidental poisonings or adverse effects from therapeutic use; those scenarios require different intent and encounter codes.