FDA issues alert on potential dangers of unproven treatment for multiple sclerosis

The U.S. Food and Drug AdministrationThe U.S. Food and Drug Administration is alerting health care professionals and patients about injuries and death associated with the use of an experimental procedure sometimes called "liberation therapy" or the "liberation procedure" to treat chronic cerebrospinal venous insufficiency (CCSVI).

Some researchers believe that CCSVI, which is characterized by a narrowing (stenosis) of veins in the neck and chest, may cause multiple sclerosis (MS) or may contribute to the progression of the disease by impairing blood drainage from the brain and upper spinal cord. However, studies exploring a link between MS and CCSVI are inconclusive, and the criteria used to diagnose CCSVI have not been adequately established.

"Because there is no reliable evidence from controlled clinical trials that this procedure is effective in treating MS, FDA encourages rigorously-conducted, properly-targeted research to evaluate the relationship between CCSVI and MS," said William Maisel, M.D., M.P.H., chief scientist and deputy director for science in the FDA's Center for Devices and Radiological Health. "Patients are encouraged to discuss the potential risks and benefits of this procedure with a neurologist or other physician who is familiar with MS and CCSVI, including the CCSVI procedures and their outcomes."

The experimental procedure uses balloon angioplasty devices or stents to widen narrowed veins in the chest and neck. However, the FDA has learned of death, stroke, detachment and migration of the stents, damage to the treated vein, blood clots, cranial nerve damage and abdominal bleeding associated with the experimental procedure. Balloon angioplasty devices and stents have not been approved by the FDA for use in treating CCSVI.

MS is a progressive, immune-mediated disorder of the brain and spinal cord. In MS, the lining around nerve fibers, and often the nerve fibers themselves, in the brain and spinal cord are injured, resulting in significant and disabling neurological symptoms. The underlying cause of MS is not known.

Complications following CCSVI treatment can be reported through MedWatch, the FDA Safety Information and Adverse Event Reporting program.

The FDA also is notifying physicians and clinical investigators who are planning or conducting clinical trials using medical devices to treat CCSVI that they must comply with FDA regulations for investigational devices. Any procedures conducted are considered significant risk clinical studies and require FDA approval, called an investigational device exemption.

In February 2012, the FDA sent a warning letter to a sponsor/investigator who was conducting a clinical study of CCSVI treatment without the necessary approval. The sponsor/investigator voluntarily closed the study.

The FDA will continue to monitor reports of adverse events associated with "liberation therapy" or the "liberation procedure" and keep the public informed as new safety information becomes available.

The FDA, an agency within the U.S. Department of Health and Human Services, protects the public health by assuring the safety, effectiveness, and security of human and veterinary drugs, vaccines and other biological products for human use, and medical devices. The agency also is responsible for the safety and security of our nation's food supply, cosmetics, dietary supplements, products that give off electronic radiation, and for regulating tobacco products.

Most Popular Now

AstraZeneca enters license agreement with KYM Bios…

AstraZeneca and KYM Biosciences Inc.* have entered into a global exclusive licence agreement for CMG901, a potential first-in-class antibody drug conjugate (ADC) targetin...

Pfizer receives positive FDA Advisory Committee vo…

Pfizer Inc. (NYSE: PFE) announced that the U.S. Food and Drug Administration's (FDA) Vaccines and Related Biological Products Advisory Committee (VRBPAC) voted that avail...

US FDA Advisory Committee votes to support effecti…

GSK plc (LSE/NYSE: GSK) announced that the US Food and Drug Administration (FDA) Vaccines and Related Biological Products Advisory Committee (VRBPAC) voted that the avail...

First nasal monoclonal antibody treatment for COVI…

A pilot trial by investigators from Brigham and Women's Hospital, a founding member of the Mass General Brigham healthcare system, tested the nasal administration of the ...

"Semantic similarity" leads to novel dru…

The words that researchers use to describe their results can be harnessed to discover potential new treatments for Parkinson's disease, according to a new study published...

Tumour cells' response to chemotherapy is driven b…

Cancer cells have an innate randomness in their ability to respond to chemotherapy, which is another tool in their arsenal of resisting treatment, new research led by the...

Engineered bacteria find tumors, then alert the au…

Combining discoveries in cancer immunology with sophisticated genetic engineering, Columbia University researchers have created a sort of "bacterial suicide squad" that ...

Nanosatellite shows the way to RNA medicine of the…

The RNA molecule is commonly recognized as messenger between DNA and protein, but it can also be folded into intricate molecular machines. An example of a naturally occur...

Gene and cell therapies to combat pancreatic cance…

Pancreatic cancer is an incurable form of cancer, and gene therapies are currently in clinical testing to treat this deadly disease. A comprehensive review of the gene an...

Digital twin opens way to effective treatment of i…

Inflammatory diseases like rheumatoid arthritis have complex disease mechanisms that can differ from patient to patient with the same diagnosis. This means that currently...

AI conjures proteins that speed up chemical reacti…

For the first time, scientists have used machine learning to create brand-new enzymes, which are proteins that accelerate chemical reactions. This is an important step in...

Pfizer's ZAVZPRET™ (zavegepant) migraine nasal spr…

Pfizer Inc. (NYSE: PFE) today announced the U.S. Food and Drug Administration (FDA) has approved ZAVZPRET™ (zavegepant), the first and only calcitonin gene-related peptid...