10018
Elderly patients for whom nitrate has been prescribed should be warned of the occurrence of hypotension , leading to unconsciousness .
 hypotension, nitrate; unconsciousness, nitrate
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: adverse effect 
Text: {0} 
Answer:
 hypotension, nitrate; unconsciousness, nitrate