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Severe rash , including the Stevens - Johnson syndrome ( SJS ) , is the major toxicity of nevirapine and is described in the package labeling with a prominent , boxed warning .
 adverse effect: Severe rash, nevirapine; adverse effect: SJS, nevirapine; adverse effect: Stevens - Johnson syndrome, nevirapine
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: adverse effect 
Text: {0} 
 Entity Pairs:  Severe rash, nevirapine; SJS, nevirapine; Stevens - Johnson syndrome, nevirapine 
Answer:
 adverse effect: Severe rash, nevirapine; adverse effect: SJS, nevirapine; adverse effect: Stevens - Johnson syndrome, nevirapine