3699
There was only one case of dementia possibly due to cimetidine ( with a drug level of 1 . 9 microgram / ml 6 hr after a dose ) in a group of 13 patients without liver or kidney disease who had cimetidine levels above 1 . 25 microgram / ml .
 dementia, cimetidine, liver or kidney disease, cimetidine
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 dementia, cimetidine, liver or kidney disease, cimetidine