Poisoning by antiallerg/antiemetic, self-harm, init

This code signifies a deliberate act of self-harm involving an overdose or misuse of medications primarily used to treat allergies (antiallergics) or prevent/treat nausea and vomiting (antiemetics). The patient intentionally ingested or administered these substances with the intent to cause harm to themselves.

Apply this code when documentation clearly indicates a patient presented due to an intentional self-poisoning with antiallergic or antiemetic drugs. This code is appropriate for the initial encounter for treatment of the acute poisoning event. Examples include an adolescent taking multiple antihistamines to harm themselves, or an adult intentionally overdosing on a prescription antiemetic.

• Always sequence this code first when it represents the primary reason for the encounter.
• Requires an additional code for the specific drug involved (e.g., from T36-T50) and a code for the intent (e.g., Z91.5- for personal history of self-harm).
• Ensure documentation explicitly states "intentional self-harm" or similar language; accidental poisonings use different codes.