Poisoning by oth drug aff the autonm nervous sys, acc, init

This code signifies an accidental overdose or adverse reaction to a medication that primarily impacts the autonomic nervous system, such as a cholinergic or anticholinergic agent, not otherwise specified. The patient's symptoms are a direct result of the drug's effect on involuntary bodily functions like heart rate, digestion, or breathing. This specific code is for the initial phase of treatment for this poisoning event.

Use this code when a patient presents to the emergency department or clinic with symptoms of poisoning due to an unintentional ingestion or administration of an autonomic nervous system-affecting drug. Examples include accidental double dosing of an anticholinergic for overactive bladder or a child ingesting a parent's medication. This code is appropriate for the initial evaluation and management of the acute poisoning.

• Always sequence this code first as the principal diagnosis when it is the reason for the encounter.
• Requires an external cause code (e.g., Y40-Y59 for drug, medicinal and biological substances causing adverse effects in therapeutic use) to fully describe the circumstances of the poisoning.
• Do not use for adverse effects of drugs taken as prescribed; those typically fall under T36-T50 with a fifth or sixth character indicating adverse effect.