A 20-year-old female has a prescription for tetracycline. While teaching the client how to take her medicine, the nurse learns that the client is also taking Ortho-Novum oral contraceptive pills. Which instructions should be included in the teaching plan?

When antibiotics and oral contraceptives are taken together, the effectiveness of the oral contraceptives can be reduced, increasing the risk of pregnancy. Therefore, it is important to advise the client to use an alternate method of birth control to prevent unintended pregnancy. Choices A, B, and C are incorrect because there is no evidence to suggest that oral contraceptives decrease the effectiveness of tetracycline, cause nausea, or result in toxicity when taken with antibiotics.