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CASE REPORT : We describe here a case of a 60 year old female that experienced a relapse of symptomatic hyperlactatemia after being switched from stavudine to zidovudine and how the case was managed at the Infectious Diseases Institute , Kampala , Uganda .
 symptomatic hyperlactatemia, stavudine; symptomatic hyperlactatemia, zidovudine
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:
 symptomatic hyperlactatemia, stavudine; symptomatic hyperlactatemia, zidovudine