2521
Ethambutol - induced toxic optic neuropathy was suspected and tablet ethambutol was withdrawn .
 Chemical: Ethambutol; Disease: toxic optic neuropathy; Chemical: ethambutol
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: Ethambutol; Disease: toxic optic neuropathy; Chemical: ethambutol