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In a random fashion , they received cimetidine 200 mg iv on one day , and on the other , a pretreatment of diphenhydramine 40 mg iv with cimetidine 200 mg iv .
 Chemical: cimetidine; Chemical: diphenhydramine; Chemical: cimetidine
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: cimetidine; Chemical: diphenhydramine; Chemical: cimetidine