A nurse is assessing a client who requests an oral contraceptive. Which of the following findings in the client's medical history should the nurse identify as a contraindication for the use of a combination oral contraceptive?

Rationale: A. Recurrent urinary tract infections (UTIs) are not a contraindication for combination oral contraceptives. While UTIs require evaluation and management, they do not increase the risk of thromboembolic events or hormonal complications associated with estrogen-containing contraceptives. B. Migraines with aura are a contraindication to combination oral contraceptives (which contain estrogen and progestin). Estrogen increases the risk of thromboembolic events (such as ischemic stroke), and this risk is significantly higher in clients who experience migraines with aura. Therefore, estrogen-containing contraceptives should be avoided in this population. C. Levothyroxine use is not a contraindication to oral contraceptives. However, estrogen can increase thyroid-binding globulin levels, which may require monitoring and possible adjustment of thyroid medication dosing, but it does not prevent contraceptive use. D. A penicillin allergy has no relationship to oral contraceptive safety. It does not affect hormone metabolism or increase the risk of complications from combination oral contraceptives.