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Ritonavir acted as a CYP3A4 inhibitor , diminishing carbamazepine metabolism and provoking an increase in serum levels and clinical toxicity .
 clinical toxicity, Ritonavir; diminishing carbamazepine metabolism, Ritonavir; increase in serum levels, Ritonavir
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:
 clinical toxicity, Ritonavir; diminishing carbamazepine metabolism, Ritonavir; increase in serum levels, Ritonavir