Not Medical Advice:
Pill imprint KC M10 has been identified as Klor-con m10 10 mEq. Its generic name is potassium chloride.
It is used in the treatment of hypokalemia. This medication is a mineral supplement used to treat or prevent low amounts of potassium in the blood. A normal level of potassium in the blood is important. Potassium helps your cells, kidneys, heart, muscles, and nerves work properly.
Most people get enough potassium by eating a well-balanced diet. Some conditions that can lower your body's potassium level include severe prolonged diarrhea and vomiting, hormone problems such as hyperaldosteronism, or treatment with "water pills"/diuretics.
Upset stomach, nausea, vomiting, gas, or diarrhea are some reported side effects of this pill.
Safety tips! FDA.gov shares 6 Tips to Avoid Medication Mistakes.