From the FDA Drug Label
DOSAGE AND ADMINISTRATION ... Doses of 40 mEq to 100 mEq per day or more are used for the treatment of potassium depletion.
Dosage should be divided if more than 20 mEq per day is given such that no more than 20 mEq is given in a single dose.
The maximum oral potassium dose is not explicitly stated, but the label indicates that doses up to 100 mEq per day or more are used for treatment of potassium depletion, with a single dose limit of 20 mEq 1.
From the Research
Maximum Oral Potassium Dose
There are no research papers provided to assist in answering this question. The studies available are related to lithium, vitamin D, creatine supplementation, and correction of hyponatremia, but none of them mention the maximum oral potassium dose. Therefore, it is not possible to provide a specific answer to this question based on the available evidence 2, 3, 4, 5, 6.