‘Work to do’ on opioids
Senators looped back repeatedly to the topic of opioids during Dr. Califf’s hearing, reflecting deep concerns about the FDA’s efforts to warn of the risks of prescription painkillers.
There were an estimated 100,306 drug overdose deaths in the United States in the 12 months ending in April, an increase of 28.5% from the 78,056 deaths during the same period the year before, according to the Centers for Disease Control and Prevention.
Dr. Califf said he plans to focus on what information the FDA conveys to the public about the risks of prescription painkillers, including a look at what the labels for these products say.
“I am committed to do a comprehensive review of the status of opioids, early in my tenure,” Dr. Califf said.
Dr. Califf indicated that physicians are still too quick to provide excess doses of these medicines, despite years of efforts to restrain their use. He said he knows relatives who were given 30-day prescriptions for opioids after minor surgery.
“So I know we have work to do,” Dr. Califf said.
Concerns about the FDA’s previous work in managing opioids has led to protests from a few Democratic senators about the prospect of President Biden nominating the acting FDA commissioner, Janet Woodcock, MD, for the permanent post.
At the hearing, Sen. Ben Ray Luján (D-NM) raised the case of the FDA’s approval of the powerful Zohydro painkiller. The agency approved that drug despite an 11-2 vote against it by the FDA’s Anesthetic and Analgesic Drug Products Advisory Committee.
Sen. Luján asked Dr. Califf what he would do if an FDA advisory committee voted “overwhelmingly” against recommending approval of a medicine, as happened in the Zohydro case.
While not mentioned by Sen. Luján in this exchange during the hearing with Dr. Califf, the FDA staff’s rejection of recommendations of advisory committees has been a growing concern among researchers.
The agency last year approved aducanumab (Aduhelm, Biogen), a drug for Alzheimer’s disease, dismissing the advice of its Peripheral and Central Nervous System Drugs Advisory Committee. That decision triggered the resignation of several members of the panel. The FDA staff also earlier rejected the conclusion the majority of members of the same advisory committee offered in 2016 on eteplirsen (Exondys 51, Sarepta), a drug for Duchenne muscular dystrophy.
Dr. Califf told Sen. Luján he had done recent research into how often the FDA staff does not concur with the recommendations of an advisory committee. He said the FDA takes a different course of action in about 25% of cases. In about three-quarters of those cases, the FDA staff opts for a “more stringent” approach regarding allowing the public access to the drug, as opposed to a more generous one as seen in the Zohydro, Aduhelm, and Exondys 51 cases.
Still, Dr. Califf said that when there’s an 11-2 advisory committee vote against recommendation of a product, “the leaders at FDA really need to take a close look” at what’s happening.
Question on accelerated approvals
The FDA’s approval of aducanumab drew attention to a debate already underway about conditional clearances known as accelerated approvals.
The FDA has used this path since the 1990s to speed access to drugs for serious conditions. The trade-off for early access is that the agency sometimes makes the wrong call based on initial findings, and clears a medicine later found not to benefit patients as expected.
The FDA’s cancer division is in the midst of public efforts to address cases where drugmakers have not been able to deliver studies that support accelerated approvals of their oncology drugs. In addition, the Office of Inspector General of the U.S. Department of Health & Human Services announced in August that it is reviewing the FDA’s handling of the accelerated approval process.
At Tuesday’s hearing, Sen. Burr grilled Dr. Califf about how he would respond to calls to change how the FDA handles the accelerated-approval process.
“Can you commit to me and to patients who may rely on cutting-edge treatments that you will not support efforts to narrow this pathway or raise the bar for drugs to be approved under those pathways?” Burr asked Califf.
Dr. Califf responded by saying he was “a fan of accelerated approval – for the right conditions.”
Earlier, in his opening statement, Dr. Califf had said his mother benefited directly from the accelerated approval of new drugs for multiple myeloma. Dr. Califf told Sen. Burr that he had spent “countless hours with patient groups” and understands the need to speed the approval of medicines for serious diseases.
But the FDA also has to make sure it holds up its end of the bargain struck with accelerated approvals. This involves checking on how these medicines work once they are marketed.
“We’re accepting that there’s more uncertainty,” Dr. Califf said. “That means we’ve got to have a better system to evaluate these products as they’re used on the market. And I think there are ways that we can do that now. Technology is making this possible in ways that it just was not possible before.”
Worries about the medical supply chain
Sen. Susan Collins (R-Maine) asked Dr. Califf about the vulnerability of the U.S. medical system to disruptions of the supply chain. She raised concerns about China’s dominance in antibiotic manufacturing as an example. She asked if Congress could do more to encourage domestic manufacturing of medical supplies, such as by offering tax incentives.
Dr. Califf told Sen. Collins he shared her concern about the U.S. manufacturing of ingredients used in both branded and generic drugs. He said he recently has served on a committee of the National Academy of Medicine that is examining supply chain issues.
This committee will soon release a report with specific recommendations, Dr. Califf said.
“We don’t have enough competitive entities in what’s become sort of a commodity business” of drug manufacturing, Dr. Califf said. “So we need a number of steps to make the system more resilient.”
A version of this article first appeared on Medscape.com.