Committees Support Pfizer’s Troxyca ER

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Members of FDA’s Anesthetics and Analgesic Drug Products Advisory Committee and the Drug Safety and Risk Management Committee voted 9-6 on 6/8 to support the safety and efficacy of Pfizer’s NDA for Troxyca ER (oxycodone HCl and naltrexone HCl extended-release capsules). The company is seeking an indication for managing pain severe enough to require daily, around-the-clock long-term opioid treatment and for which alternative treatment options are inadequate.

Those supporting the chronic pain indication reportedly said that the company’s Phase 3 trial met the standard of approval set under the agency’s 505(b)(2) application pathway.

FDA staff explained to committee members that current regulations prevent it from refusing to approve an opioid analgesic based on a lack of abuse-deterrent properties. Many of the committee members voting in favor of the drug said they did not factor abuse-deterrence into their decision. A suggestion was made that the approval standards be reevaluated to reflect a growing desire to limit the number of long-acting/extended-release opioids available.

Those voting not to approve the drug cited concerns including the ease with which the oxycodone component may be extracted and separated from the naltrexone component; lack of clarity on the added value of the drug in terms of its abuse-deterrence; and a lack of evidence for efficacy of the entire opioid analgesic drug class in treating chronic pain.

Nine of the 15 committee members voted that Troxyca ER should not be labeled as an abuse-deterrent product by the oral route, given the concern about separating oxycodone from naltrexone and concern about whether the evidence of abuse-deterrence by the oral route meets appropriate labeling claim standards.

In other votes, 11 members said that Troxyca ER should be labeled as abuse-deterrent through the nasal route. And nine members voted that it should be labeled as abuse-deterrent by the intravenous route.

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