What must staff do when a client is prescribed a new medication?

When a client is prescribed a new medication, closely supervising the client to monitor their reaction is vital for ensuring their safety and well-being. This monitoring allows staff to observe any potential side effects or adverse reactions that the client may experience as their body adjusts to the new medication. It is essential for early detection of problems, which can be crucial in managing the client's overall health.

Effective monitoring involves checking for changes in the client’s behavior, vital signs, and any specific side effects that are known to be associated with the medication. This proactive approach helps staff respond promptly if any issues arise, ensuring the client receives the appropriate care and intervention as needed.

The other options do not align with best practices: documenting the medication without supervision does not ensure safety, immediate administration without monitoring could lead to adverse consequences, and waiting for a doctor's follow-up before supervision may delay necessary care and oversight. Therefore, monitoring the client closely after a new medication is administered is the most responsible and appropriate course of action.