1961
The administration of cloxacillin reduced the effect of warfarin , and subsequent increases in warfarin doses were unable to overcome this effect .
 Chemical: cloxacillin; Chemical: warfarin; Chemical: warfarin
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: cloxacillin; Chemical: warfarin; Chemical: warfarin