Friday, April 24, 2009

At Least the Europeans Appreciate Novo's Victoza

It’s all smiles again at Novo Nordisk following yesterday’s news that EMEA has recommended approval of its GLP-1 agonist liraglutide (Victoza).

The positive opinion followed a decidedly lukewarm US advisory committee outcome earlier this month, where concerns were raised not over cardiovascular safety (a possibility, given FDA’s more stringent diabetes guidelines) but over a raised incidence of thyroid c-cell tumors in rodents during pre-clinical trials. (We cheekily suggested thereafter that Novo might not mind so much about GLP-1s anyway.)

The European regulators, however, appear to agree with Novo’s CSO Mads Thomsen that “the mechanism [behind the raised incidence of thyroid c-cell tumors] is one that mice and rats are sensitive to, but that monkeys and humans are not.”

The regulators haven’t even requested that the company take any additional measures—such as thyroid cancer screening—to rule out the potential risk. “There are no restrictions on usage” as a result of the pre-clinical thyroid cancer data, Thomsen told The IN VIVO Blog. “It was a clean approval.”

Well, a clean recommendation anyway; the European Commission must still issue the final marketing authorization, expected in about two months. With that in hand, Novo will begin to sell Victoza in various European markets over the summer.

This un-restricted European thumbs-up for Victoza matters not just for the drug’s EU commercial potential. China, for instance—a key emerging market for Novo--requires a sponsor to have home-market approval before it can even submit a new therapy. And there will be positive knock-on effects of a European approval in other markets, too, adds Thomsen, since "some countries simply base their approval decisions on the European outcome."

Unfortunately, the US is not one of them. FDA is due to decide late next month whether to approve Victoza, but based on the split advisory panel outcome and an almost entirely risk-focused (as opposed to benefit-focused) discussion, things don’t look good. Analysts including Matthew Osborne, SVP at Lazard Capital Markets, reckon that the best case would be that Victoza launches on time during the second half of the year but with a black box warning and/or monitoring for thyroid cancer. Other options: a 6-12 month-delay due to a request for additional data, or outright rejection. Not a great outlook for a drug predicted to become a blockbuster by 2012.

This isn't the first time European regulators have approved a drug that FDA has rejected or at least prevaricated over. Sanofi-Aventis' obesity candidate rimonabant (Acomplia; Zimulti in the US) was another. Given what happened to that (rejection in the US, withdrawal in Europe), it's interesting--comforting?--to see that FDA's ultra-risk-focused conservatism isn't rubbing off too hard on the Europeans just yet.

image by flikrer sean-b used under a creative commons licence

1 comment:

Anonymous said...

plus add some drugs that were approved in the EU but never filed in the US and it seems that the FDA has become a great deal more stringent than the EMEA lately.