14754
The safety and tolerability of ceftazidime - avibactam has been reported in three phase I pharmacokinetic studies and two phase II clinical studies .
 ceftazidime, avibactam
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 ceftazidime, avibactam