Poisn by centr-acting/adren-neurn-block agnt, undet, init

This code signifies a case where a patient has experienced adverse effects from centrally-acting or adrenergic-neuron-blocking medications, and the intent of the exposure (e.g., accidental, intentional self-harm, assault) cannot be determined. The patient is presenting for the initial treatment of these poisoning symptoms.

This code is appropriate when a patient presents with signs and symptoms of poisoning from drugs like clonidine, guanfacine, or reserpine, and the medical record does not specify whether the exposure was accidental, intentional, or due to assault. It is specifically used for the first encounter related to this particular poisoning event.

• Always assign an additional code for the specific drug if known.
• Do not use this code if the intent of the poisoning (accidental, intentional, assault, therapeutic use) is documented.
• Ensure the "A" seventh character is used only for the initial encounter for this specific poisoning.