Math and Dosage Calculations for Health Care 3rd Edition by James Whaley, Kathryn Booth, Booth Kathryn

Exercise 27

In Exercises 18, determine if the dosage ordered is safe. Then find the amount to administer.
The patient: 81-year-old male, 5 ft tall, 138 lb, CL CR of 63 mL/min, and renal impairment. Patient is within ideal weight range.
Ordered: Ticarcillin 2 g IV q4h
On hand: Ticar 1-g vial, 200 mg/mL when reconstituted
According to the package insert, the usual dose, after the initial loading dose, for patients with infections complicated by renal insufficiency, is 3 g q4h with creatinine clearance over 60 mL/min; 2 g q4h for 30 to 60 mL/min; 2 g q8h for 10 to 30 mL/min; 2 g q12h for less than 10 mL/min; other amounts for patients with complications.