A nurse is caring for a client who has a prescription for morphine 4 mg IM stat. The medication is dispensed in a 5 mg/mL prefilled syringe. Which of the following actions should the nurse take?

Discard the excess medication with a second nurse as a witness.

Inject the prescribed dose and save the rest for a later use.

Dispose of the excess medication in the sharps container.

Give the full contents of the prefilled syringe.