To treat hypokalemia, which is a low level of potassium in the blood, the adult oral dosage for potassium chloride is 40 to 100 milliequivalents per day, according to Drugs.com and Mayo Clinic. The same daily amount is given intravenously, but no more than 10 to 40 milliequivalents per hour.
To treat children with hypokalemia, the total daily oral dose of potassium chloride is no more than 2 to 5 milliequivalents per kilogram, states Drugs.com. Throughout the day, no individual dose should be more than 1 to 2 milliequivalents per kilogram. Based on an intravenous dosage of 0.5 to 1 milliequivalent per kilogram, the total daily amount should not exceed 40 milliequivalents. One milliequivalent per kilogram per hour is the maximum intravenous rate.