This is what I found in Potassium levels:
If you have your blood checked, you might compare your readings with normal levels. The normal potassium level is 3.5-5.0 mEq/L (this is a measure used to evaluate the level). Low potassium is defined as a potassium level below 3.5 mEq/L.
My dr. got all bent out of shape about 5 months ago cause mine went to 3.3. I would consult with your dr. If U are taking a BP med. that holds in the potassum, like Ace's or ARB's U shouldn't take in too much potassium. Diuretics seem to make your potassium low, depending on what kind U take.
Hope this helps....