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Health professional risk communication

Archived - Potential interaction of Proton Pump Inhibitors (PPIs) with Plavix (clopidogrel) - For the Public

Starting date:
August 20, 2009
Posting date:
August 20, 2009
Type of communication:
Public Communication
Source of recall:
Health Canada
General Public
Identification number:

This is duplicated text of a letter from sanofi-aventis Canada Inc. and Bristol-Myers Squibb.
Contact the company for a copy of any references, attachments or enclosures.

Notice about Health Canada advisories

Public Communication
Health Canada Endorsed Important Safety Information on Plavix (clopidogrel)

August 20, 2009

Subject: Potential drug interaction between Proton Pump Inhibitors (PPIs) and Plavix® (clopidogrel)

Sanofi-aventis Canada Inc. and Bristol Myers Squibb Canada Co., in collaboration with Health Canada, would like to inform you of a potential drug interaction between proton pump inhibitors (PPIs) and Plavix®. PPIs are used to treat stomach ulcers and heartburn and Plavix® is used to prevent blood clots that could lead to life-threatening events such as heart attack or stroke. This update is due to recent reports in the scientific literature suggesting a potential interaction that may reduce the effect of Plavix®.

  • Healthcare professionals and patients should be aware of a potential interaction between PPIs and Plavix® that may reduce the effect of Plavix® and therefore reduce its ability to prevent events such as heart attack or stroke.
  • Patients currently taking Plavix® should continue to take their Plavix® as directed. Patients should talk to their doctor if they are currently taking or are considering taking a PPI, as there are alternative therapies for the treatment of stomach ulcers and heartburn.

The Canadian prescribing information for Plavix® is being revised to provide doctors, pharmacists and patients with updated information regarding this potential interaction. Patients should discuss all their current medications with their healthcare professionals.

Managing marketed health product-related adverse reactions depends on health care professionals and consumers reporting them. Reporting rates determined on the basis of spontaneously reported post-marketing adverse reactions are generally presumed to underestimate the risks associated with health product treatments. Any case of serious drug interaction with a PPII or other serious or unexpected adverse reactions in patients taking Plavix® should be reported to sanofi-aventis Canada Inc. or Health Canada at the following addresses:

sanofi-aventis Canada Inc.
2150 St. Elzear Blvd. West
Laval, Quebec, H7L 4A8
Telephone: 1-800-265-7927

The Product Monograph (prescribing information) and a copy of this Important Safety Information can be accessed online at sanofi-aventis Canada Inc. and at Bristol-Myers Squibb Canada Co. Web sites.

Any suspected adverse reaction can also be reported to:
Canada Vigilance Program
Marketed Health Products Directorate
Address Locator: 0701C
Ottawa, Ontario, K1A 0K9
Telephone: 613-957-0337 or Fax: 613-957-0335
To report an Adverse Reaction, consumers and health professionals may call toll free:
Telephone: 866-234-2345
Fax: 866-678-6789

The Adverse Reaction Reporting Form and the Adverse Reaction Guidelines can be found on the Health Canada Web site or in The Canadian Compendium of Pharmaceuticals and Specialties.

For other inquiries related to this communication, please contact Health Canada at: Marketed Health Products Directorate (MHPD)
Telephone: 613-954-6522
Fax: 613-952-7738

For media enquiries:
Christian Marcoux, Director of Communications
1-877-904-2667 or 514-904-2667

original signed by

Laurent-Didier Jacobs, M.D.
Vice President, Medical Affairs
sanofi-aventis Canada Inc

original signed by

H. Mitchell Shulman, MDCM, FRCPC, CSPQ
Vice President, Medical
Bristol-Myers Squibb Canada Co.


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