The practical nurse (PN) is assisting with the plan of care for a client who is receiving the nonsteroidal anti-inflammatory drug ketorolac for painful muscle spasms of the back. Which intervention should the PN include in the client's plan of care?

Administer the medication at least 30 minutes prior to the client's meals.

Ensure peak and trough serum levels are collected with the third dose of medication.

Observe the client for development of involuntary movements of the lips and tongue.

Assess the skin daily for areas of ecchymosis or other signs of bleeding.