Antidepressants, blood pressure medications, and certain anxiety or sleep medications can cause drug interactions with ritonavir. While some interactions can decrease the effectiveness of ritonavir, others can increase your risk of developing serious side effects. Other medicines that may cause potentially dangerous drug interactions with ritonavir include disulfiram, alfuzosin, ergot medications, and metronidazole.
Ritonavir (Norvir®) can potentially interact with several other medicines. Some of the medicines that may lead to drug interactions with ritonavir include: