Biomarkers for Evaluation of Postnasal Drip Associated Cough

Technology #2011-176

Calcitonin gene related peptide (CGRP) and Substance P (SP) were elevated in the nasal secretions of patients with postnasal drip who also have chronic cough compared to levels from nasal secretions from patients without cough. A point-of-care test which can assay the level of CGRP and SP may be helpful in predicting whether or not chronic cough is due to postnasal drip.