About the Study

Asthma: A study to see how histamine response can guide treatment

Who can be in this study: • Children ages 6-17 years • Diagnosed with asthma that has been uncontrolled • African-American or Caucasian The purpose of this research study is to find out if a Laser Doppler (HILD) type test that looks at histamine response can help determine if certain groups of children with asthma respond differently to antihistamines (drugs that block histamine) such as levocetirizine (study drug) than others. We also want to see if certain gene patterns in children with asthma may be related to how a child responds to levocetirizine.

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Full Study Name: A Histamine Pharmacodynamic Biomarker to Guide Treatment in Pediatric Asthma