A nurse working in the emergency department is assessing a client with an anxiety disorder. The client has had significant life stressors that have led to an uncontrollable panic attack and a call to 911. The nurse notes the client is breathing rapidly, complaining of dizziness, and attempting to stand up, stating “I have to leave NOW.” Which of the following interventions is most appropriate for this nurse to implement?

• Administer 2L oxygen per nasal cannula
• Facilitate a nebulizer treatment
• Provide reassurance to the client
• Administer a benzodiazepine as ordered