Drug Study Fails to Mention Risk of Death to Test Subjects
Filed under: Drugs & Medical Devices, Ethics, Research
Danse Macabre, XLVII, The Blind Man. Hans Holbein the Younger (1497 or 1498 to 1543)
[Ed. Note: Today's Post is by Maansi K. Raswant, a Seton Hall Law student pursuing the Health Law concentration. She is a research assistant to the Center for Health & Pharmaceutical Law & Policy and an intern at the NYC Health and Hospitals Corporation.]
As reported recently in the Boston Globe, a federal probe found that heart attack survivors enrolled in a clinical trial conducted in over 120 sites nationally had not been adequately informed of the safety risks of the study, including the risk of death.
The process under study, chelation, involves “periodic infusions of a drug– in this case, disodium EDTA.” The infusions are being tested in conjunction with the ingestion of high doses of vitamins and minerals. However, according to the federal probe, “in 2008 FDA removed disodium EDTA from the FDA’s approved list and withdrew of approval of new drug applications for disodium EDTA.” Test subjects were not informed that disdodium EDTA “is no longer FDA approved for any use and has been removed from the market because of safety concerns.”
Funded by the National Heart, Lung and Blood Institute and the National Center for Complementary and Alternative Medicine, the study has over 1,500 subjects. Though researchers suspended enrollment last August due to the investigation, federal officials allowed the study to continue pending further findings of the probe, a decision that has been highly criticized.
In addition to the deficiencies regarding the informed consent of study participants, the Boston Globe reported that the investigation found that several co-investigators involved in the study had been disciplined for “substandard practices” or had been involved in insurance fraud. Three were convicted felons. Federal officials explained that they found the substandard practices and convictions of the principal investigators “concerning” but not a reason to “automatically preclude an investigator from participating in research.”
The U.S. Office of Human Research Protections detailed the findings of the investigation and required corrective actions in a letter to the three medical institutions heading the study. In response to the investigation’s findings, the study modified the consent form to recognize death as a “rare complication of the EDTA [chelation] infusions.” The Office of Human Research Protections has also requested further modification of the form to disclose that disodium EDTA had been removed from the market.
Despite the change in consent form, questions remain about the acceptability of the risks posed by the study. As the Globe reports, critics of the study, including the head of bioethics at the University of Pennsylvania, Arthur Caplan, have charged that the risks posed by the study are unethical. The complaint against the study filed with the Office of Human Research Protections noted that since “the mid-1970’s court documents and newspapers have reported at least 30 deaths associated with intravenous EDTA.”
The probe is the lastest in a string of major investigations of clinical trials, including the continuing investigation into payments by device maker Medtronic to Dr. Timothy Kulko (who is accused of falsifying author names and study results), and the Synthes indictment for allegations that its subsidiary, Norian, conspired to conduct unauthorized clinical trials that placed subjects at risk of death without properly informing them of the risks. In the Synthes/Norian matter, three patients are believed to have died as a result of the use of the companies’ bone cement products.
