3042
We report a case of penile fibrosis after intracavernous self - injection of a combination of phentolamine and papaverine .
 penile fibrosis, papaverine; penile fibrosis, phentolamine
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:
 penile fibrosis, papaverine; penile fibrosis, phentolamine