UPDATE 2-US panel partly backs wider use of AstraZeneca drug

(Adds panel member, company comments)

By Lisa Richwine

SILVER SPRING, Md., April 8 (Reuters) - AstraZeneca PLC (AZN.L) won partial support from U.S. advisers on Wednesday for its bid to expand the approved uses of a blockbuster schizophrenia drug.

A committee of Food and Drug Administration advisers said Seroquel XR was safe enough for treating some patients with depression but opposed use of the drug for fighting anxiety given the serious side effects.

The panel voted 6-3 that Seroquel XR had acceptable risks if it was added to other medicines to find a workable combination to alleviate depression. Several panel members stressed that doctors should try other treatments for depression first before deciding to add Seroquel XR.

"I think this represents a second-line therapy," said panel member Frank Greenway, an endocrinologist at Pennington Biomedical Research Center in Louisiana.

The panel split 4-4, with one abstention, when asked if it was safe enough to use Seroquel XR as the only treatment for depression in some cases. Panelists said there were safer medicines that should be tried if only one medicine was going to be used.

The FDA will consider the panel's input as it decides whether to approve the expanded use for Seroquel XR. The agency usually follows panel recommendations.

Seroquel is AstraZeneca's second-best-selling drug with $4.5 billion in 2008 sales. Seroquel XR is an extended release version of the medicine with a longer patent life than the original formula.