leukotriene receptor antagonist-associated churg–strauss syndrome leukotriene receptor antagonist-associated churg–strauss syndrome leukotriene receptor antagonist-associated churg–strauss syndrome may occur in asthma patients being treated with leukotriene receptor antagonists, occurring 2 days to 10 months after the antagonist has been started, with features of the syndrome including peripheral eosinophilia, pulmonary infiltrates, and less commonly neuropathy, sinusitis, and cardiomyopathy.: 135–6 leukotriene receptor antagonist-associated churg–strauss syndrome