Ardelyx Tenapanor NDA Hits FDA Snag
Ardelyx says it received a letter from FDA saying that as part of its ongoing review of the company’s NDA for tenapanor, it found deficiencies that preclude discussion of labeling and post-marketing requirements/commitments at this time. The submission is seeking an indication for controlling serum phosphorus in adult patients with chronic kidney disease on dialysis. “While the FDA has not provided specific details regarding the deficiencies, the FDA noted that a key issue is the size of the treatment effect and its clinical relevance,” the company says.
The company immediately requested a meeting to discuss the deficiencies and was notified by the agency 7/19 that its request was denied. In April, FDA extended the user fee action date to 7/29 after the company submitted additional analyses requested by reviewers.
“This is an extremely disheartening and disappointing communication from the FDA, particularly following the weeks of label discussions that occurred in early April, the fact that our NDA submission included three pivotal trials across 1,000 patients, all which met their primary and key secondary endpoints, as well as the additional data analyses we submitted in late April in response to the FDA’s requests,” says company president Mike Raab.