An older adult patient with a history of renal failure is brought in to the emergency department with sudden onset of acute confusion, worsening muscle weakness in the extremities, abdominal cramps, and a weak, rapid, and thready pulse. What are the immediate nursing interventions to stabilize the patient? Select all that apply.

a) Administering diuretics
b) Administering 0.9% saline
c) Administering antipsychotics
d) Administering calcium channel blockers