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Protease inhibitors ( ritonavir and saquinavir ) were added to the treatment and the patient developed progressive ataxia related to carbamazepine toxicity .
 carbamazepine toxicity, carbamazepine; carbamazepine toxicity, ritonavir; carbamazepine toxicity, saquinavir; progressive ataxia, carbamazepine; progressive ataxia, ritonavir; progressive ataxia, saquinavir
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:
 carbamazepine toxicity, carbamazepine; carbamazepine toxicity, ritonavir; carbamazepine toxicity, saquinavir; progressive ataxia, carbamazepine; progressive ataxia, ritonavir; progressive ataxia, saquinavir