Selected Protease Inhibitors/Didanosine Interactions
This information is generalized and not intended as specific medical advice. Consult your healthcare professional before taking or discontinuing any drug or commencing any course of treatment.
Medical warning:
Moderate. These medicines may cause some risk when taken together. Contact your healthcare professional (e.g. doctor or pharmacist) for more information.
How the interaction occurs:
When atazanavir or indinavir are taken at the same time as buffered didanosine (Videx), your body absorbs less atazanavir or indinavir.When atazanavir, darunavir/ritonavir, lopinavir/ritonavir capsules or solution, or plain ritonavir and didanosine enteric-coated (EC, or Videx EC) are taken at the same time, your body absorbs less didanosine.
What might happen:
If you take atazanavir or indinavir at the same time as buffered didanosine, the levels of indinavir in your blood may decrease, making it less effective.If you take atazanavir, darunavir/ritonavir, lopinavir/ritonavir capsules or solution, or plain ritonavir at at the same time as your didanosine EC, the levels of didanosine in your blood may decrease, making it less effective.
What you should do about this interaction:
You should not take didanosine at the same time that you take your atazanavir, darunavir/ritonavir, indinavir, lopinavir/ritonavir capsules or solution, or ritonavir.Take didanosine EC at a different time as atazanavir. Take buffered didanosine 1 hour before or 2 hours after taking atazanavir.You should separate the times that you take your indinavir and didanosine by at least one hour.Take your didanosine at least one hour before or two hours after your darunavir/ritonavir, or lopinavir/ritonavir capsules or solution. Lopinavir/ritonavir tablets may be taken at the same time as didanosine.You should separate the times that you take your plain ritonavir and didanosine by at least two and one-half hours.If you have been taking these medicines at the same time, let your healthcare professionals (e.g. doctor or pharmacist) know. Your doctor may want to run some blood tests to see if your medicines are working properly.Your healthcare professionals may already be aware of this interaction and may be monitoring you for it. Do not start, stop, or change the dosage of any medicine before checking with them first.
- 1.Videx (didanosine) US prescribing information. Bristol-Myers Squibb Company November, 2011.
- 2.Reyataz (atazanavir sulfate) US prescribing information. Bristol-Myers Squibb Company November, 2023.
- 3.Crixivan (indinavir sulfate) US prescribing information. Merck & Co., Inc. September, 2016.
- 4.Prezista (darunavir) US prescribing information. Janssen Therapeutics March, 2023.
- 5.Kaletra (lopinavir/ritonavir capsules) US prescribing information. Abbott Laboratories September, 2016.
- 6.Norvir (ritonavir) US prescribing information. Abbott Laboratories December, 2019.
- 7.Kaletra (lopinavir/ritonavir tablets) US prescribing information. Abbott Laboratories December, 2019.
Selected from data included with permission and copyrighted by First Databank, Inc. This copyrighted material has been downloaded from a licensed data provider and is not for distribution, except as may be authorized by the applicable terms of use.
CONDITIONS OF USE: The information in this database is intended to supplement, not substitute for, the expertise and judgment of healthcare professionals. The information is not intended to cover all possible uses, directions, precautions, drug interactions or adverse effects, nor should it be construed to indicate that use of a particular drug is safe, appropriate or effective for you or anyone else. A healthcare professional should be consulted before taking any drug, changing any diet or commencing or discontinuing any course of treatment.