Poisoning by other and unspecified respiratory drugs

This code signifies an adverse reaction or overdose due to respiratory medications not specifically classified elsewhere. It encompasses toxic effects from drugs like bronchodilators, antitussives, expectorants, or decongestants when the specific drug is known but lacks a more precise ICD-9 code, or when the drug is unspecified.

Use this code when documentation indicates poisoning by a respiratory drug that doesn't fall under more specific categories (e.g., antiasthmatics, antihistamines). This includes scenarios where a patient presents with symptoms of toxicity after accidental or intentional ingestion/exposure to an "other" or "unspecified" respiratory agent.

• Always attempt to identify the specific drug involved for more precise coding; this code is a last resort for "other" or "unspecified" respiratory drugs.
• Remember to also code the manifestation of the poisoning (e.g., coma, respiratory depression) as an additional diagnosis.
• Distinguish between poisoning (adverse effect due to overdose or wrong substance) and adverse effect in therapeutic use, which would typically use E-codes.