3764
In patients with downbeat nystagmus who are taking anticonvulsant medications , consideration should be given to reduction in dose before further investigation is undertaken .
 Disease: downbeat nystagmus
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:
 Disease: downbeat nystagmus