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?

Dispose of the excess medication in the sharps container.

Give the full contents of the prefilled syringe.

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

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