Which HIV protease inhibitor is known to interact with hormonal contraception?

Prepare for the NAPLEX Contraception and Infertility Test. Engage with interactive flashcards and multiple choice questions, each equipped with hints and explanations. Ensure your readiness for the exam!

Multiple Choice

Which HIV protease inhibitor is known to interact with hormonal contraception?

Explanation:
The main concept is that HIV protease inhibitors can interact with hormonal contraception through liver enzyme metabolism. Ritonavir is a potent inhibitor of CYP3A4, and it’s commonly used to boost levels of other protease inhibitors. Hormonal contraceptives (estrogen and progestin components) are largely metabolized by CYP3A4, so when ritonavir is present, it can markedly alter their hormone levels, potentially increasing side effects or changing the contraceptive effect. This is why ritonavir is the protease inhibitor most known for interacting with hormonal contraception, and clinicians may adjust ART or contraception strategy accordingly, such as using an alternative regimen or adding a non-hormonal method.

The main concept is that HIV protease inhibitors can interact with hormonal contraception through liver enzyme metabolism. Ritonavir is a potent inhibitor of CYP3A4, and it’s commonly used to boost levels of other protease inhibitors. Hormonal contraceptives (estrogen and progestin components) are largely metabolized by CYP3A4, so when ritonavir is present, it can markedly alter their hormone levels, potentially increasing side effects or changing the contraceptive effect. This is why ritonavir is the protease inhibitor most known for interacting with hormonal contraception, and clinicians may adjust ART or contraception strategy accordingly, such as using an alternative regimen or adding a non-hormonal method.

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