Side effects can include gastrointestinal discomfort, including nausea and vomiting, diarrhea, and bleeding of the digestive tract. Overdoses cause hyperkalemia, which can lead to paresthesia, cardiac conduction blocks, fibrillation, arrhythmias, and sclerosis. Because of the danger of hyperkalemia, the US FDA limits the amount of potassium supplements to 99 mg (about 1.3 mEq) while recommending an adult daily intake of 4700 mg (about 63 mEq).
Potassium chloride 
Calcium chloride
Sodium bicarbonate
Potassium canrenoate
Ringer's lactate solution
Calcium gluconate
Potassium bromide
Mannitol