2550
We report a myeloma patient who developed severe paralytic ileus during bortezomib therapy , which presented in the context of progressive constipation without other known causes and which regressed promptly with medical management after drug cessation , suggesting a direct causal relationship .
 adverse effect: severe paralytic ileus, bortezomib
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "relation1: word1, word2; relation2: word3, word4". 
Option: adverse effect 
Text: {0} 
Answer:
 adverse effect: severe paralytic ileus, bortezomib