Final answer:
To administer phenytoin IV push to a client with dextrose 5% in water infusing continuously, it is important to stop the infusion and flush the port with normal saline prior to administration.
Step-by-step explanation:
When administering phenytoin IV push to a client who has dextrose 5% in water infusing continuously, it is important to stop the infusion and flush the port with normal saline prior to administration. This is done to prevent any interaction between phenytoin and dextrose, as dextrose can cause precipitation of the medication. Pinching the line above the infusion port or holding the medication and collaborating with the provider may not be sufficient to ensure the safe administration of the medication.