Rosiglitazone (Avandia) requires caution regarding:

Rosiglitazone (Avandia) requires caution regarding:

• A. Decreased effectiveness of birth control pills
• B. Excessive exposure to the sun
• C. Sudden drop in blood pressure with dizziness
• D. Possible severe diarrhea

Answer: (A)

Understanding drug interactions with hormonal contraception is the key idea. Birth control pills depend on steady hormone levels to prevent pregnancy, and any medication that alters how the liver metabolizes these hormones can reduce pill effectiveness. Rosiglitazone is processed by the liver and can influence hepatic enzyme activity, which may lower the effectiveness of combined estrogen-progestin pills. Because of this, a patient taking rosiglitazone should use an additional nonhormonal form of contraception or a backup method while on the medication and for an appropriate period after. The other potential issues listed—sun sensitivity, sudden blood pressure changes with dizziness, or severe diarrhea—are not typical concerns with rosiglitazone, so they’re not the focus here.

Understanding drug interactions with hormonal contraception is the key idea. Birth control pills depend on steady hormone levels to prevent pregnancy, and any medication that alters how the liver metabolizes these hormones can reduce pill effectiveness. Rosiglitazone is processed by the liver and can influence hepatic enzyme activity, which may lower the effectiveness of combined estrogen-progestin pills. Because of this, a patient taking rosiglitazone should use an additional nonhormonal form of contraception or a backup method while on the medication and for an appropriate period after. The other potential issues listed—sun sensitivity, sudden blood pressure changes with dizziness, or severe diarrhea—are not typical concerns with rosiglitazone, so they’re not the focus here.