In a Surprise Move FDA Delays Ruling on Approval of GSK's Anti-Cervical Cancer Vaccine
A spokesperson at the US Food and Drug Administration (FDA) announced today that it decided to delay its decision whether or not to approve GlaxoSmithKline’s (GSK) anti-cervical cancer vaccine Cervarix. The agency was scheduled to announce its ruling Tuesday on whether to approve Cervarix, but a GSK spokeswoman said the review will continue. An agency spokesperson failed to disclose any reasons for the delay because FDA doesn’t comment on ongoing product reviews. This is the second regulatory delay for Cervarix in the past two years.
The delay comes as something of a surprise because earlier this Earlier this month, an outside panel of health experts voted that Cervarix appears safe and effective for girls and women ages 10 to 25. The FDA is not required to follow the group's advice, though it usually does. Cervarix already is approved in nearly 100 other countries, but has been delayed in the U.S. since 2007, when the FDA said it needed additional safety data.
An approval from FDA would allow London-based GSK to compete against Merck's blockbuster vaccine Gardasil, which has been on the US market following its approval in 2006. Based on all available published reports, Cervarix has a similar safety profile and efficacy profile as compared with Gardasil.
One of the issues with Cervarix may be the adjuvant use to formulate the vaccine to bolster anti-HPV immunity. While Merck's Gardasil uses an aluminum salt adjuvant, Cervarix uses a novel adjuvant known as AS04. The agency’s lack of familiarity with AS04 and possible concerns about its safety may be what is delaying the Cervarix decision.
Stay tuned for further details!
