Idiopathic anaphylaxis (IA) is a condition in which anaphylaxis occurs without any known external trigger. The most common causes of anaphylaxis are reactions to foods, drugs, and stinging insects, but a cause is not identified in up to 50 percent of people with recurrent anaphylaxis. Volunteer participants in this study will help National Institutes of Health (NIH) researchers try to identify the cause and development of IA. Findings from this study may be a first step toward the development of new medicines and treatments.
If you have been diagnosed with idiopathic anaphylaxis and are interested in participating in this clinical research study, you will be asked to answer some questions and then make one or two visits to NIH in Bethesda, Maryland, to determine your eligibility. During these visits, study staff will take a sample of your blood. They also may take a sample of bone marrow from your hip. Your participation in the study will continue for up to 12 months, the first six months of which you will receive the study drug every two or four weeks in a randomized placebo-controlled trial (you may or may not receive the active drug, and this is determined similar to a coin toss). You may receive a thorough medical evaluation to exclude known causes of anaphylaxis, if necessary. You or your insurance carrier will not be charged for study-related procedures or medications.
The study is being conducted at the NIH Clinical Center in Bethesda, Maryland, which is accessible by car and public transportation. After you are accepted in the study, you may be reimbursed for your travel expenses.
You may be able to participate in the study if all of the following apply to you:
You cannot participate in the study if any of the following apply to you:
To learn more about this study, visit www.clinicaltrials.gov.
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Last Updated April 09, 2013
Last Reviewed February 13, 2015