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Administration of parenteral quinine must be done carefully and with good observation because of its pro - arrhythmic effect , especially in older patients who have heart diseases or patients with electrolyte disorder ( hypokalemia ) which frequently occurs due to vomiting and or diarrhea in malaria cases .
 Chemical: quinine; Disease: arrhythmic; Disease: heart diseases; Disease: electrolyte disorder; Disease: hypokalemia; Disease: vomiting; Disease: diarrhea; Disease: malaria
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: quinine; Disease: arrhythmic; Disease: heart diseases; Disease: electrolyte disorder; Disease: hypokalemia; Disease: vomiting; Disease: diarrhea; Disease: malaria