Re: Nut allergy & elevated IgE levels
In the US, a normal IgE level for a person with no allergies at all is 5. 30 is mildly elevated, 100 is normal for someone with asthma, and 1,000+ is very uncommon. Of course, your test may have used different units.
Yes, IgE levels can be lowered in two ways. The cheapest is allergy shots, to desensitize you and reduce your allergic response. Currently we have allergy shots for things like dust, cats, and pollen, but not for nuts. (Scientists are working on it.)
The other way is with a drug called Xolair, but it's so expensive that it's usually only used in people who have severe asthma that can't be controlled through other means.
If you do have asthma, the Seretide should help, although it'll take a couple weeks to see the full benefit.