Which of the following women would the nurse advise to use a back-up contraceptive in addition to their birth control pills?
A.
Being treated for tuberculosis
B.
Is a diabetic taking insulin
C.
On antibiotics for bronchitis
D.
Takes inhalers for asthma
ANS: A
The effectiveness of oral contraceptive pills (birth control pills [BCPs]) can be decreased by several medications, including rifampin (Rifadin), isoniazid (Tubizid), barbiturates, and griseofulvin (Fulvicin-U/F). Other drugs that can decrease BCP effectiveness include acetaminophen (Tylenol), anticoagulants, and some anticonvulsants. The patient being treated for tuberculosis would most likely be taking either (or both) rifampin and isoniazid. The other patients would not have a decreased effectiveness of their BCPs due to medications, unless the diabetic patient had the disease for more than 20 years or has vascular complications.
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