A client who had an appendectomy and is receiving morphine sulfate and complains of nausea and pruritus

A client with a urinary tract infection who is receiving intravenous antibiotics and has gross hematuria

A client who received a loop diuretic for congestive heart failure and now complains of orthostatic symptoms.

A client with gastroenteritis who has had emesis for 21 hours and now complains of muscle pain and weakness.