Extreme caution would be necessary with the use of gentamicin in which of the following patients?
A) A patient who is morbidly obese and who has primary hypertension
B) A patient who has chronic renal failure secondary to diabetes mellitus
C) A patient who has bipolar disorder and who is on long-term lithium therapy
D) A patient who has an atrioventricular block
B
Feedback:
Gentamicin is nephrotoxic, and with impaired renal function, a reduction in dosage is essential. Heart blocks, obesity, and lithium therapy do not severely complicate, or contraindicate, the use of an aminoglycoside.
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