“The antihistamines mepyramine (1 μM) and metiamide (1 μM), the … (0.1 μM), or the cyclooxygenase enzyme (COX) inhibitor diclofenac (10 μM) each caused a parallel … in the dose-response relation for OVA , providing evidence for contributions of histamine, cysteinyl-leukotrienes, … to the OVA-induced bronchoconstriction in the IPL.”