Final answer:
One should call the patient to introduce oneself as the new nurse and adhere to the specific requirement of carrying a blue bag and wearing black pants for the home visit.
Step-by-step explanation:
The correct action would be to telephone the patient, introduce yourself as the new nurse, and ensure to adhere to the specific requirements set by the previous nurse regarding attire and equipment. This includes carrying a blue bag and wearing black pants when visiting the patient's home. Maintaining these conditions is likely a part of creating a comfortable and trusting environment for the patient, hence supporting the continued management of the patient's condition with haloperidol injections.