K‑Hold Powder Sachet is used to treat high potassium levels in the blood (hyperkalemia), which can occur in children with kidney problems or conditions affecting potassium balance. High potassium can affect muscle and heart function, so it is important to lower it safely. In a 3‑year-old child, this medicine should only be given under a doctor’s supervision, with the dose and monitoring determined based on the child’s age, weight, potassium levels, and overall health.