27806
Dose - substitution studies demonstrated that behavior was sensitive to dose for both drugs , but MDPV ( 0 . 01 - 0 . 50 mg / kg / inf ) showed greater potency and efficacy than METH ( 0 . 1 - 0 . 25 mg / kg / inf ) .
 Chemical: MDPV; Chemical: METH
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: MDPV; Chemical: METH