The nurse has removed a barbiturate capsule from the unit dose wrapper to administer to a client. The client decides to watch a television program and requests not to take the medication. Which action should the nurse implement?

Keep the medication and see if the client will want to take it later.

Credit the medication back and put it in the client's medication box.

Explain that since the medication is a controlled substance it must be taken.

Have another nurse watch the disposal of the medication into the disposal container.