After diagnosing a client with pulmonary tuberculosis, the physician tells family members that they must receive isoniazid (INH [Laniazid]) as prophylaxis against tuberculosis. The client's daughter asks the nurse how long the drug must be taken. What is the usual duration of prophylactic isoniazid therapy?
a) 1 to 3 weeks
b) 6 to 12 months
c) 2 to 4 months
d) 3 to 5 days
Answer: b) 6 to 12 months
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