Thyrogen: posible contaminacion.

Thyrogen (TSH recombinante) es un producto (farmaco)utilizado como ayuda en el estudio y tratamiento de pacientes con cancer de tiroides; permite la realizacion de estudios de medicina nuclear sin tener que suspender el tratamiento con levotiroxina. La American Thyroid Association emitio este boletin advirtiendo sobre la posible contaminacion de algunos de los lotes de este producto. El boletin a continuacion:

FDA notification of Potential Contamination of Products Manufactured by Genzyme Corporation

The U.S. Food and Drug Administration is warning healthcare professionals about the potential for foreign particle contamination of several products manufactured by Genzyme Corporation that are used to treat rare, serious, and life-threatening diseases. The foreign particles, believed to be found in less than 1% of products based on product lots assessed to date, include stainless steel fragments, non-latex rubber from the vial stopper, and fiber-like material from the manufacturing process and could potentially cause serious adverse events in patients. This problem affects all lots of the below listed products which have the prefix "A" (e.g., Lot A12345). The affected products are manufactured by Genzyme Corporation at their Allston Landing, MA, facility.

The affected products include:

  • Cerezyme (imiglucerase) for Gaucher disease
  • Fabrazyme (agalsidase beta) for Fabry disease
  • Myozyme/Lumizyme (alglucosidase alpha) for Pompe disease
  • Aldurazyme (laronidase) for mucoploysaccharidosis I
  • Thyrogen (thyrotropin alpha) used as an adjunctive diagnostic tool and treatment for thyroid cancer

At this time, no adverse event reports related to potential foreign particle contamination have been received by FDA. However, healthcare professionals should be alert for the development of adverse events.

For additional information, including considerations for healthcare professionals, please visit FDA's Web site at

To report any unexpected adverse or serious events associated with the use of these products, please contact the FDA MedWatch program and complete a form online at or report by fax to 1-800-FDA-0178, by mail using the postage-paid address form provided online, or by telephone to 1-800-FDA-1088.

Genzyme Corporation sends a letter to all health care practitioners:
A letter from Genzyme Corporation to all health care practitioners is available for download:

Foreign Particles: ThyrogenR (thyrotropin alfa for injection) Letter from Genzyme (PDF File, 144 KB)

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