Public Health Advisory
Gadolinium-containing Contrast Agents for Magnetic Resonance Imaging (MRI):
Omniscan, OptiMARK, Magnevist, ProHance, and MultiHance

The FDA is evaluating important safety information about gadolinium-containing contrast agents and a disease known as Nephrogenic Systemic Fibrosis or Nephrogenic Fibrosing Dermopathy (NSF/NFD) that occurs in patients with kidney failure. New reports have identified a possible link between NSF/NFD and exposure to gadolinium containing contrast agents used at high doses for a procedure called Magnetic Resonance Angiography (MRA). An MRA test uses magnetic resonance imaging to take pictures of blood vessels. During an MRA test, a drug known as a gadolinium-contrast agent is injected into a patient's vein so blood vessels can be distinguished from other nearby tissues.

The FDA has learned of 25 cases of NSF/NFD in patients with kidney failure who received Omniscan®, a gadolinium-containing contrast agent, and took the MRA test. The FDA is actively investigating whether exposure to a gadolinium-contrast agent for MRA is associated with the development of NSF/NFD. While FDA conducts its investigation, the following recommendations are being provided to health care providers and patients:

• Gadolinium-containing contrast agents, especially at high doses, should be used only if clearly necessary in patients with advanced kidney failure (those currently requiring dialysis or with a Glomerular Filtration Rate (GFR) = 15 cc/min or less).
• It may be prudent to institute prompt dialysis in patients with advanced kidney dysfunction who receive a gadolinium contrast MRA. Although there are no data to determine the utility of dialysis to prevent or treat NSF/NSD in patients with decreased kidney function, average excretory rates of gadolinium are 78%, 96%, and 99% in the first to third hemodialysis sessions, respectively (Okada, et al, Acta Radiologica, vol 42 p. 339, May 2001).

Five gadolinium-containing contrast agents are FDA-approved for use during magnetic resonance imaging (MRI), a test that can look at internal body organs and tissues. The trade names of the U.S. approved gadolinium-containing contrast agents are: Omniscan, OptiMARK, Magnevist, ProHance, and  MultiHance. None of these drugs are FDA approved for MRA. The dose of gadolinium-containing contrast agent given to patients undergoing an MRA test is often higher (up to three times) than the approved dose for MRI.

NSF/NFD appears to occur in patients with kidney failure along with high levels of acid in body fluids a condition known as acidosis that is common in patients with kidney failure. Patients with NSF/NFD have tight and rigid skin making it difficult to bend joints. NSF/NFD may also result in fibrosis, or scarring, of body organs resulting in the inability of body organs to work properly and can lead to death. Diagnosis of NSF/NFD is done by looking at a sample of skin under a microscope.

Scientists first identified NSF/NFD in 1997 and the cause of NSF/NFD is unknown. Worldwide, there are approximately 200 reports of NSF/NFD.

The 25 cases of NSF/NFD were reported on May 29, 2006, by the Danish Medicines Agency. Among these, 20 cases occurred in Denmark and five cases occurred in Austria. The patients developed NSF/SFD within 3 months (range 2 weeks to 3 months) after receiving the gadolinium-containing contrast agent. The five patients from Austria are described in a publication: Grobner T. Gadolinium - a specific trigger for the development of nephrogenic fibrosing dermopathy and nephrogenic systemic fibrosis Nephrol dial Transplant. 21(4):1104-8.

The FDA has not yet determined whether exposure by patients with kidney failure to gadolinium-containing contrast agents during an MRA test causes NSF/NFD. The FDA is gathering additional information about NSF/NFD and investigating whether other patients who received gadolinium-containing contrast agents developed NSF/NFD.

The FDA urges health care providers and patients to report adverse event information to the FDA via the MedWatch program by phone (1-800-FDA-1088), by fax (1-800-FDA-0178), or by the Internet at http://www.fda.gov/medwatch/index.html.

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FOR IMMEDIATE RELEASE P07-90 May 23, 2007

Media Inquiries: Karen Riley, 301-827-6242 Consumer Inquiries: 888-INFO-FDA

FDA Requests Boxed Warning for Contrast Agents Used to Improve MRI Images

The U.S. Food and Drug Administration (FDA) has asked manufacturers to include a new boxed warning on the product labeling of all gadolinium-based contrast agents which are used to enhance the quality of magnetic resonance imaging (MRI).

The requested warning would state that patients with severe kidney insufficiency who receive gadolinium-based agents are at risk for developing a debilitating, and a potentially fatal disease known as nephrogenic systemic fibrosis (NSF). In addition, it would state that patients just before or just after liver transplantation, or those with chronic liver disease, are also at risk for developing NSF if they are experiencing kidney insufficiency of any severity.

"FDA has been carefully monitoring potential safety signals related to these contrast agents after receiving reports about the risk of this potentially life-threatening disease," said Steven Galson, M.D., M.P.H., director of FDA's Center for Drug Evaluation and Research. "This latest action demonstrates FDA's continuing vigilance about ensuring the safety of drug products once they enter the marketplace."

Patients with NSF develop thickening of the skin and connective tissues that inhibits their ability to move and may result in broken bones. Other organs are at risk of thickening as well. The cause of NSF is not known and there is no consistently effective treatment of this condition.

FDA first notified health care professionals and the public about the gadolinium-related risks for NSF in June 2006 . Information on the risks was updated in December.

Gadolinium-based contrast agents are commonly used to improve the visibility of internal structures when patients undergo an MRI. Five gadolinium-based contrast agents have been approved for use in the United States: Magnevist (gadopentetate dimeglumine), Ominiscan (gadodiamide); OptiMARK (gadoversetamide); MultiHance;(gadobenate dimeglumine);and Prohance (gadoteridol).

Reports have identified the development of NSF following single and multiple administrations of the gadolinium-based contrast agents. The reports have not always identified a specific agent. Omniscan was the most commonly reported agent, when a specific agent was identified, followed by Magnevist and OptiMARK.

NSF also has developed after the sequential administration of Omniscan and MultiHance and Omniscan and ProHance. Because reports incompletely describe exposure to gadolinium-based contrast agents, it is not possible to know if the extent of risks for developing NSF is the same for all agents.

Patients should be screened for kidney problems prior to receiving one of these imaging agents. The recommended dose should not be exceeded and enough time should elapse to ensure that a dose has been eliminated from the body before the agent is used again.

There have been no reports of NSF among patients with normal kidney function or those with mild-to-moderate kidney insufficiency.

Bayer Schering Pharma, Berlin, Germany, manufactures Magnevist; GE Healthcare, Chalfont St. Giles, U.K., is the maker of Omniscan; OptiMARK is manufactured by Mallinckrodt, Inc., Hazelwood, Mo.; and ProHance and Multihance are made by Bracco Diagnostics Inc., Princeton, N.J.

For more information see www.fda.gov/cder/drug/infopage/gcca/default.htm.