Anti-histamines: They can be h1-receptor antagonists such as Benadryl (diphenhydramine) or periactin or loratadine. Or, h2-receptor antagonists such as tagamet or ranitidine. Or, h3/h4 receptor antagonists (experimental) such as thioperamide. Or, atypical antihistamines such as catechin. Or, others such as cromolyn.
Answered 11/28/2017
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