2923
Medications were given four times daily ; the azelastine groups received 0 . 5 , 1 . 0 , or 2 . 0 mg in the morning and evening with placebo in the early and late afternoon ; the chlorpheniramine group received 4 . 0 mg four times daily .
 Chemical: azelastine; Chemical: chlorpheniramine
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: azelastine; Chemical: chlorpheniramine