Typically you can not reach the same level of potassium through diet or an over-the-counter potassium supplement that you would get from a prescription of Effer-K.

Over-the-counter potassium supplements are limited to 99mg of potassium each (about 1/5 of the potassium found in an average banana) which is about 2.5 mEq. The smallest dose of Effer-K is our 10 mEq effervescent potassium. For serious potassium repletion a prescription for Effer-K is a fast, effective and inexpensive solution.