FDA Hits Altor Bio Over Promo Violations

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FDA has issued an untitled letter to Altor BioScience, an indirect wholly owned subsidiary of ImmunityBio, alleging that promotional Web pages for bladder cancer drug Anktiva (nogapendekin alfa inbakicept-pmln) are false or misleading and violate federal law. In the just-posted letter, CDER’s Office of Prescription Drug Promotion (OPDP) said it found that both a healthcare provider and a consumer-facing Web page for Anktiva misbranded the drug by overstating evidence for long-term clinical benefits.

The agency said the promotional materials improperly suggested that the therapy reduced the need for cystectomy and improved disease-specific survival, despite a lack of adequate clinical evidence to support those claims. According to OPDP, the Web pages cited data showing that 84% of responding patients were “cystectomy free” at 36 months and that disease-specific overall survival at 36 months was 99%. The agency said those figures were extracted from updated results of the single-arm QUILT-3.032 study, which was not designed to establish improvements in time-to-event outcomes such as cystectomy avoidance or survival.

“Absent an appropriate comparator, it is not possible to determine if the observed effect is attributable to Anktiva or to other factors, such as the natural history of the disease,” OPDP wrote. It acknowledged that the Web pages included footnotes cautioning that the cystectomy and survival data were secondary endpoints from a single-arm study and should be interpreted carefully. However, the enforcement unit said those disclaimers did not sufficiently mitigate the overall misleading impression created by the promotional claims, adding that it had previously raised similar concerns in an untitled letter sent to Altor last September.

OPDP requested that Altor take immediate corrective action, including ceasing the dissemination of the cited materials, and submit a written response within 15 working days outlining how it plans to address the violations.

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