Re: Effect of Xolair on Allergy Tests

[Guest guest]

Hi, Gordon,

Re 1, the answer is yes. I had to have a blood test for an allergen because

Xolair can affect the skin test results.

Cheryl

----- Original Message -----

From: Gordon Bear<mailto:gbear@...>

<mailto: >

Sent: Thursday, March 24, 2005 5:21 PM

Subject: [ ] Effect of Xolair on Allergy Tests

My asthmatic friend Kathy visited a new doctor yesterday, an allergist who

tested her via skin pricks for allergies to all kinds of stuff. Big

surprise: A few things that had provoked a reaction in testing a few

months ago - notably cat hair - provoked no reaction at all this time.

She had told the doctor about her injections of Xolair, which started last

September, but he didn't say whether the Xolair could have caused this

change.

I checked the Website for Xolair (www.xolair.com) and can find nothing

about the effect of the drug on allergy tests, so I am asking the good

people in this group:

1. Does Xolair change a patient's reactions to skin tests for allergens?

2. If so, is the lack of reaction to a substance that previously provoked

a reaction simply a change in the response to the test (i.e., a false

negative), or does it indicate a true absence of allergy to that substance

(i.e., a remission of that allergy)? It would be great news if Kathy were

now really free of allergy to cats!

Thank you for your help, good people, and best wishes with your own

issues.

Gordon

Ramsey, New Jersey

[Guest guest]

Gordon,

I have been on Xolair for three months. About a week my wife and I

were walking through the neighborhood and one the neighbor's dogs

came up to me. I decided to test my reaction to its saliva. The

dog licked my arms several times, and amazingly, I had no reactions,

not even an itchy feeling. Prior to Xolair I would have broken out

in hives wherever the dog licked me. I am thinking that skin

allergies are probably the first thing to go with the Xolair

treatments. This stuff is truly a Godsend!

Regards,

--- In , " Cheryl " <hoefelmeyer@h...>

wrote:

>

> Hi, Gordon,

> Re 1, the answer is yes. I had to have a blood test for an

allergen because Xolair can affect the skin test results.

>

> Cheryl

> ----- Original Message -----

> From: Gordon Bear<mailto:gbear@r...>

> To:

<mailto: >

> Sent: Thursday, March 24, 2005 5:21 PM

> Subject: [ ] Effect of Xolair on Allergy Tests

>

>

>

> My asthmatic friend Kathy visited a new doctor yesterday, an

allergist who

> tested her via skin pricks for allergies to all kinds of stuff.

Big

> surprise: A few things that had provoked a reaction in testing a

few

> months ago - notably cat hair - provoked no reaction at all this

time.

>

> She had told the doctor about her injections of Xolair, which

started last

> September, but he didn't say whether the Xolair could have

caused this

> change.

>

> I checked the Website for Xolair (www.xolair.com) and can find

nothing

> about the effect of the drug on allergy tests, so I am asking

the good

> people in this group:

>

> 1. Does Xolair change a patient's reactions to skin tests for

allergens?

>

> 2. If so, is the lack of reaction to a substance that previously

provoked

> a reaction simply a change in the response to the test (i.e., a

false

> negative), or does it indicate a true absence of allergy to that

substance

> (i.e., a remission of that allergy)? It would be great news if

Kathy were

> now really free of allergy to cats!

>

> Thank you for your help, good people, and best wishes with your

own

> issues.

>

> Gordon

> Ramsey, New Jersey

>

>

>

>

>

[Guest guest]

Would not the xolair also affect the blood test by soaking up the

free floating IGE?

>

> Hi, Gordon,

> Re 1, the answer is yes. I had to have a blood test for an

allergen because Xolair can affect the skin test results.

>

> Cheryl

> ----- Original Message -----

> From: Gordon Bear<mailto:gbear@r...>

> To:

<mailto: >

> Sent: Thursday, March 24, 2005 5:21 PM

> Subject: [ ] Effect of Xolair on Allergy Tests

>

>

>

> My asthmatic friend Kathy visited a new doctor yesterday, an

allergist who

> tested her via skin pricks for allergies to all kinds of stuff.

Big

> surprise: A few things that had provoked a reaction in testing a

few

> months ago - notably cat hair - provoked no reaction at all this

time.

>

> She had told the doctor about her injections of Xolair, which

started last

> September, but he didn't say whether the Xolair could have

caused this

> change.

>

> I checked the Website for Xolair (www.xolair.com) and can find

nothing

> about the effect of the drug on allergy tests, so I am asking

the good

> people in this group:

>

> 1. Does Xolair change a patient's reactions to skin tests for

allergens?

>

> 2. If so, is the lack of reaction to a substance that previously

provoked

> a reaction simply a change in the response to the test (i.e., a

false

> negative), or does it indicate a true absence of allergy to that

substance

> (i.e., a remission of that allergy)? It would be great news if

Kathy were

> now really free of allergy to cats!

>

> Thank you for your help, good people, and best wishes with your

own

> issues.

>

> Gordon

> Ramsey, New Jersey

>

>

>

>

>

[Guest guest]

My doctor told me that there is no test they can give us in the

doctor's office for IgE that will separate the free-floating from

the already Xolair-bound IgE - so basically if you get an IgE score

of 700 while on Xolair, there's no way to tell how much is already

bound. He did say that Genentech can do it in the research lab, but

it's too hard or too expensive or both at this point, so they don't

have a test yet that can be used on a broader basis.

Addy

> >

> > Hi, Gordon,

> > Re 1, the answer is yes. I had to have a blood test for an

> allergen because Xolair can affect the skin test results.

> >

> > Cheryl

> > ----- Original Message -----

> > From: Gordon Bear<mailto:gbear@r...>

> > To:

> <mailto: >

> > Sent: Thursday, March 24, 2005 5:21 PM

> > Subject: [ ] Effect of Xolair on Allergy Tests

> >

> >

> >

> > My asthmatic friend Kathy visited a new doctor yesterday, an

> allergist who

> > tested her via skin pricks for allergies to all kinds of

stuff.

> Big

> > surprise: A few things that had provoked a reaction in testing

a

> few

> > months ago - notably cat hair - provoked no reaction at all

this

> time.

> >

> > She had told the doctor about her injections of Xolair, which

> started last

> > September, but he didn't say whether the Xolair could have

> caused this

> > change.

> >

> > I checked the Website for Xolair (www.xolair.com) and can find

> nothing

> > about the effect of the drug on allergy tests, so I am asking

> the good

> > people in this group:

> >

> > 1. Does Xolair change a patient's reactions to skin tests for

> allergens?

> >

> > 2. If so, is the lack of reaction to a substance that

previously

> provoked

> > a reaction simply a change in the response to the test (i.e.,

a

> false

> > negative), or does it indicate a true absence of allergy to

that

> substance

> > (i.e., a remission of that allergy)? It would be great news if

> Kathy were

> > now really free of allergy to cats!

> >

> > Thank you for your help, good people, and best wishes with

your

> own

> > issues.

> >

> > Gordon

> > Ramsey, New Jersey

> >

> >

> >

> >

> >

[Guest guest]

I wondered about that, but they said no. Of course, they could just be covering

up for not knowing by lying. Medical people do that often.

----- Original Message -----

From: aramo2811<mailto:aramar@...>

<mailto: >

Sent: Monday, March 28, 2005 9:40 AM

Subject: [ ] Re: Effect of Xolair on Allergy Tests

Would not the xolair also affect the blood test by soaking up the

free floating IGE?

>

> Hi, Gordon,

> Re 1, the answer is yes. I had to have a blood test for an

allergen because Xolair can affect the skin test results.

>

> Cheryl

> ----- Original Message -----

> From: Gordon Bear<mailto:gbear@r...>

> To:

<mailto: >

> Sent: Thursday, March 24, 2005 5:21 PM

> Subject: [ ] Effect of Xolair on Allergy Tests

>

>

>

> My asthmatic friend Kathy visited a new doctor yesterday, an

allergist who

> tested her via skin pricks for allergies to all kinds of stuff.

Big

> surprise: A few things that had provoked a reaction in testing a

few

> months ago - notably cat hair - provoked no reaction at all this

time.

>

> She had told the doctor about her injections of Xolair, which

started last

> September, but he didn't say whether the Xolair could have

caused this

> change.

>

> I checked the Website for Xolair (www.xolair.com) and can find

nothing

> about the effect of the drug on allergy tests, so I am asking

the good

> people in this group:

>

> 1. Does Xolair change a patient's reactions to skin tests for

allergens?

>

> 2. If so, is the lack of reaction to a substance that previously

provoked

> a reaction simply a change in the response to the test (i.e., a

false

> negative), or does it indicate a true absence of allergy to that

substance

> (i.e., a remission of that allergy)? It would be great news if

Kathy were

> now really free of allergy to cats!

>

> Thank you for your help, good people, and best wishes with your

own

> issues.

>

> Gordon

> Ramsey, New Jersey

>

>

>

>

>