http://www.forbes.com/forbeslife/health/feeds/hscout/2007/02/21/hscout602123.html

(one of many sources on this news)

"...The majority of physicians who prescribe Xolair are allergists or
pulmonologists, and most are aware of this potential adverse
reaction," said Dr. David Weldon, director of allergy and pulmonary
lab services at Scott & White Clinic, in College Station, Texas. "I
think more allergists are going to equip patients with EpiPens
[anaphylaxis remedies] to be able to utilize them, based upon the
black box warning. It would be prudent that anybody who's on Xolair
make sure they get one of the commercially available epinephrine
sources like an EpiPen."

Although many patients consider the drug only slightly short of a
miracle, some cases of anaphylaxis have been reported following
administration of the drug. These reactions have occurred at a rate of
about one in 1,000 patients, the FDA said...".