11903
Methods : Cocktail approach was used to evaluate the influence of IR and IPC on the activities of CYP1A2 , CYP2C9 , CYP2E1 , CYP2D6 and CYP3A4 , which were reflected by the changes of pharmacokinetic parameters of five specific probe drugs : caffeine , chlorzoxazone , tolbutamide , metoprolol and midazolam , respectively .
 Chemical: caffeine; Chemical: chlorzoxazone; Chemical: tolbutamide; Chemical: metoprolol; Chemical: midazolam
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: caffeine; Chemical: chlorzoxazone; Chemical: tolbutamide; Chemical: metoprolol; Chemical: midazolam