The patient is a 92-year-old male, 5 ft 10 in. tall, weighs 170 lb, and has a creatinine clearance of 6 mL/min diagnosed with a complicated urinary tract infection. Assume that the patient has impaired renal function. Ordered: Fortaz 500 mg IV q12h. Is this a safe dose to administer? Write: safe or not safe. 
Fill in the blank(s) with the appropriate word(s).
not safe
For a creatinine clearance of 6 mL, the recommended dose is .
Ordered 500 mg q12h = .
This dose is twice the maximum safe dose, so it is not safe.
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