672
Diazepam , unless contraindicated or risky , remains the only necessary complementary drug to ketamine as it buffers its cardiovascular response and decreases the duration and intensity of operative and postoperative hallucinations .
 Chemical: Diazepam; Chemical: ketamine; Disease: hallucinations
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: Diazepam; Chemical: ketamine; Disease: hallucinations