How should the use of Compazine be coded on the MDS?

Compazine is a first generation antipsychotic medication, it is sometimes used for psychiatric indications, but it is most commonly used for nausea and vomiting.  Based on MDS coding guidelines it should be coded not based on its intent or reason for use but based on its classification. 

Regardless of the intent of the use the MDS coding should be based on the classification of the drug.  The side effects listed for compazine include the same extrapyrmidal adverse effects as other antipsychotic medications and the facility is responsible for monitoring for these adverse effects