A nurse is caring for a client who has become violent and is threatening self-harm following a crisis. After ensuring enough staff are available, which of the following actions should the nurse take first?

A reason: Administer a sedative medication. While administering a sedative may be necessary to calm the client, it is not the first step. The nurse should initially attempt to de-escalate the situation using non-pharmacological interventions. B reason: Perform a debriefing with the staff. Debriefing with the staff is important after the situation is under control, but it is not the immediate priority. The focus should first be on addressing the client's behavior and emotions. C reason: Acknowledge the client's emotions. Acknowledge the client's emotions to de-escalate the situation and help the client feel heard and understood. This can reduce the immediate risk of violence or self-harm. D reason: Place the client in restraints. Restraints should be used as a last resort when other interventions have failed and there is an immediate risk of harm. The nurse should first try to calm the client through verbal and emotional support.