What action should be taken after administering any medication?

After administering any medication, the appropriate action is to initial or sign the Medication Administration Record (MAR). This step is crucial because it provides a formal record that the medication has been given to the resident, ensuring accountability and tracking for healthcare providers. Proper documentation in the MAR is essential for continuity of care, as it informs other staff members about what medications have been administered, the time of administration, and the identity of the person who administered the medication. This helps prevent medication errors and ensures that residents receive their medications safely and as prescribed.

The other options do not directly address the immediate post-administration procedure required for accurate medication management and documentation.