should be diluted in a glass of cold water or juice.
need to be taken on an empty stomach.
Number 3 is correct.
Rationale: Oral potassium supplements can cause GI distress; they should be dissolved in a full glass of water or juice and taken close to mealtime, though the time of day does not matter. Taking them without food can cause additional GI distress. Potassium can be stored at room temperature.