Guest guest Posted July 12, 2010 Report Share Posted July 12, 2010 When I took the test I read on the instruction to not take vitamins of any unnecessery medication 5 days prior to the test. There were some more instructions but that is what I remember. > > Are there any special instructions should follow before testing RBC potassium? > Thanks,S > Quote Link to comment Share on other sites More sharing options...
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