Nomax Inc, an FDA registered specialty pharmaceutical company, offers Effer-K, a prescription strength, effervescent potassium repletion therapy. Once dropped into water, the potassium bicarbonate tablet effervesces, bubbling off carbon dioxide, and resulting in oral potassium citrate solution. This product is available in three different strengths: 10 mEq, 20 mEq, and 25 mEq. A variety of different flavors are offered, as well as an unflavored option. Effer-K is manufactured in St. Louis, Missouri.