Vasudha Pharma Chem Limited manufactures Anti-histamine Desloratadine. Vasudha Pharma Chem Limited is an ISO 9001:2000 accredited company. Anti-histamine Desloratadine is used to relieve hay fever and allergy symptoms, including sneezing; runny nose; and red, itchy, tearing eyes. Desloratadine is in a class of medications called antihistamines. It is also used to treat hives. It works by blocking histamine, a substance in the body that causes allergic symptoms. This medicine may cause less drowsiness than other antihistamines. It is available in the form of tablet. The chemical name of this medicine is 8-Chloro-6, 11-dihydro-11- [4-piperidinylidene]-5H-benzo[5,6] cyclohepta [1,2-b] pyridine.