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

Exercise 122

In Exercises 24, determine if the dosage ordered is safe. If the order is safe, then find the amount to administer. Assume that the patients have impaired renal functions.
The patient: 92-year-old female, 5 ft 1 in. tall, 112 lb, CL CR of 32 mL/min. Patient is within ideal weight range. Ordered: Timentin 2 g IV q4h On hand: Timentin reconstituted to 20 mg/mL
According to the package insert, for patients with renal impairment, the following maintenance dosages are recommended: for creatinine clearance over 60 mL/min, 3.1 g q4h; for 30 to 60 mL/min, 2 g q4h; for 10 to 30 mL/min, 2 g q8h; for less than 10 mL/min, 2 g q12h. For patients with more advanced impairments, lower dosages are recommended.