A college-age woman has been taking oral contraceptives for the past year. She visits the student health center with a strep throat and is placed on ampicillin. What instruction should the nurse provide to the patient?
a. Double the dose of ampicillin, because the pill can reduce the blood level of the antibiotic.
b. Use a back-up method of birth control for this cycle, because the antibiotic can reduce the effectiveness of the pill.
c. Stop the birth control pill, because using the two medications simultaneously can cause an allergic reaction.
d. Use a vaginal lubricant while taking the antibiotic, because the interaction of the two drugs increases dryness.
ANS: B
The nurse should advise the patient to use a back-up method of birth control, because the antibiotic can reduce the pill's effectiveness.
The ampicillin dose should not be doubled.
The OC should not be discontinued, because efficacy would decrease.
The concern is not with vaginal dryness, but with the ineffectiveness of the OC during concurrent use with the antibiotic.
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