Safety Advisories in Anemic Cancer Patients
Amgen sent a "dear doctor" letter in January, 2007, that highlighted results from a recent anemia of cancer trial, and warned doctors to consider use in that off-label indication with caution.
Amgen advised the U.S. Food and Drug Administration (FDA) as to the results of the DAHANCA 10 clinical trial. The DAHANCA 10 data monitoring committee found that 3-year loco-regional control in subjects treated with Aranesp was significantly worse than for those not receiving Aranesp (p=0.01).
In response to these advisories, the FDA released a Public Health Advisory on March 9, 2007, and a clinical Alert for doctors on February 16, 2007, about the use of erythropoeisis-stimulating agents such as epogen and darbepoetin. The advisory recommended caution in using these agents in cancer patients receiving chemotherapy or off chemotherapy, and indicated a lack of clinical evidence to support improvements in quality of life or transfusion requirements in these settings.
In addition, on March 9, 2007, drug manufacturers agreed to new "black box" warnings about the safety of these drugs. On November 8, 2007, additional "black box" warnings were included on the aranesp label, at the request of the FDA.
On March 22, 2007, a congressional inquiry into the safety of erythropoeitic growth factors was reported in the news media. Manufacturers were asked to suspend drug rebate programs for physicians and to also suspend marketing the drugs to patients.
Read more about this topic: Darbepoetin Alfa
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