Adverse effect of parasympath and spasmolytics, sequela

This code indicates a long-term or residual condition resulting from a past adverse reaction to anticholinergic or antimuscarinic medications, or other spasmolytics. These drugs block the action of acetylcholine, affecting various bodily functions. The sequela implies that the acute adverse effect has resolved, but a lasting health problem remains.

Use this code when documenting a chronic or permanent health issue directly attributable to a previous adverse effect of medications such as atropine, scopolamine, or dicyclomine. Examples include persistent cognitive impairment after anticholinergic delirium, or chronic urinary retention following a severe antimuscarinic reaction. This code is appropriate when the initial adverse event is no longer active, but its consequences persist.

• Always use this code as a secondary diagnosis, following the code for the specific sequela (e.g., persistent cognitive deficit).
• Ensure documentation clearly links the current condition to a past adverse drug event involving the specified drug classes.
• Distinguish from acute adverse effects (which would use an active encounter code) and poisoning (which involves overdose or toxicity).