Cilostazol (Greater Than 50 mg)/Selected Strong & Moderate CYP3A4 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:

Very Serious. These medicines may interact and cause very harmful effects and are usually not taken together. Contact your healthcare professional (e.g. doctor or pharmacist) for more information.

How the interaction occurs:

When these two medicines are taken together, your body may not process cilostazol properly.

What might happen:

Your blood levels of cilostazol may increase and cause harmful effects.

What you should do about this interaction:

Contact your doctor if you experience headache; diarrhea; dizziness; or bloating or swelling of the ankles, feet, or hands. The dose of your medicines may need adjusting.Your healthcare professionals (e.g. doctor or pharmacist) may already be aware of this drug 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.Pletal (cilostazol) US prescribing information. Otsuka America Pharmaceutical, Inc. January, 2015.
  • 2.Suri A, Forbes WP, Bramer SL. Effects of CYP3A inhibition on the metabolism of cilostazol. Clin Pharmacokinet 1999;37 Suppl 2:61-8.
  • 3.Abbas R, Chow CP, Browder NJ, Thacker D, Bramer SL, Fu CJ, Forbes W, Odomi M, Flockhart DA. In vitro metabolism and interaction of cilostazol with human hepatic cytochrome P450 isoforms. Hum Exp Toxicol 2000 Mar; 19(3):178-84.

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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.