Adverse effect of phenothiazine antipsychot/neurolept, init

This code signifies an undesirable or harmful reaction experienced by a patient due to the therapeutic use of phenothiazine antipsychotics or other neuroleptic medications. These adverse effects are not due to overdose or poisoning, but rather an unintended consequence of appropriate drug administration.

Apply this code when a patient presents for the first time with symptoms directly attributable to an adverse reaction from a phenothiazine or neuroleptic drug. This includes side effects like extrapyramidal symptoms, tardive dyskinesia, neuroleptic malignant syndrome, or severe sedation, when the medication was prescribed and taken as directed.

• Always sequence this code after the code for the specific manifestation of the adverse effect.
• Ensure documentation clearly links the adverse effect to a phenothiazine or neuroleptic medication.
• Verify that the encounter is indeed the "initial encounter" for the management of this specific adverse effect.