Poisoning by other and unspecified drugs acting on muscles

This code signifies an adverse reaction or overdose due to medications primarily affecting muscle function, excluding those specifically acting on the autonomic nervous system. This includes poisoning from muscle relaxants, neuromuscular blocking agents, or other drugs that directly impact muscle contraction or relaxation. The patient presents with symptoms such as muscle weakness, paralysis, respiratory depression, or other systemic effects resulting from the drug's action on muscles.

Apply this code when documentation clearly indicates poisoning by a drug whose primary mechanism of action is on the musculoskeletal system, and the specific drug is not classified elsewhere. This is appropriate for accidental or intentional overdose, or adverse effects from therapeutic use, where the drug's primary target is muscle tissue. Supporting documentation should specify the drug class and the resulting toxic effects.

• Always code the specific drug responsible for the poisoning if known and a more specific code exists.
• Requires an E-code to identify the external cause of the poisoning (e.g., accidental, intentional self-harm).
• Distinguish from adverse effects of drugs acting on the central nervous system or autonomic nervous system, which have different code categories.