STD Home > Drug Interactions With Ritonavir

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.

Drug Interactions With Ritonavir: An Introduction

Ritonavir (Norvir®) can potentially interact with several other medicines. Some of the medicines that may lead to drug interactions with ritonavir include:
  • Certain anxiety or sleep medications, such as:


  • Certain chemotherapy medications, such as:


    • Bromocriptine (Parlodel®)
    • Dihydroergotamine (Migranal®)
    • Ergonovine
    • Ergotamine (Bellamine S®, Cafergot®, Ergomar®)
    • Methylergonovine (Methergine®)
    • Pergolide (Permax®)
  • Hormonal contraceptives (birth control pills, patches, or rings)
  • Immune-suppressing medications, such as:


  • Phosphodiesterase type 5 inhibitors (PDE5 inhibitors), including:


Written by/reviewed by:
Last reviewed by: Kristi Monson, PharmD;
Last updated/reviewed:
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