Patient's question:
NoDoctor's answer:
Common H1 receptor antagonists include diphenhydramine, cyproheptadine, chlorpheniramine, etc.; avastine, cetirizine, mizolastine, loratadine, ebastine, desloratadine, etc. When monotherapy is ineffective, two different types of H1 receptor antagonists can be combined or used in conjunction with H2 receptor antagonists. Common H2 receptor antagonists include cimetidine, ranitidine, famotidine, etc. They are effective for both acute and chronic urticaria, as well as cold-induced urticaria. Dosage varies from person to person.② Doxepin is a tricyclic antidepressant that is particularly effective for chronic urticaria with fewer side effects. For patients with urticaria who do not respond to traditional antihistamines, doxepin is a better choice.