24848
In the case of gabapentin , only two optimally selected test blood samples , at 1 . 5 and 6 hours after administration of a single doses , were necessary .
 Chemical: gabapentin
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: gabapentin 
Answer:
 Chemical: gabapentin