1935
To complicate matters , anticonvulsant drugs can cause mood disturbances , while antidepressant drugs can lower seizure threshold , making it difficult to treat patients suffering from both depression and epilepsy .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None