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However , the use of lithium should be avoided with any patient who is purging , since it may exacerbate the loss of intracellular potassium , thereby increasing the risk of cardiac toxicity .
 adverse effect: cardiac toxicity, lithium; adverse effect: loss of intracellular potassium, lithium
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: cardiac toxicity, lithium; adverse effect: loss of intracellular potassium, lithium