Potassium Chloride is an essential electrolyte supplement used to treat and prevent hypokalemia (low blood potassium). Potassium is a critical intracellular cation vital for maintaining cellular membrane potential, nerve impulse conduction, muscle contraction (including cardiac muscle), and normal renal function. In the Indian context, it is widely used, especially in patients on diuretics, with gastrointestinal losses, or with poor dietary intake.
Adult: Oral (Treatment): 40-100 mEq per day in 2-4 divided doses. Oral (Prevention): 20-40 mEq per day. IV: Dose must be individualized based on serum K+ levels. Typical infusion concentration should not exceed 40 mEq/L in peripheral lines or 60 mEq/L in central lines. Rate should not exceed 10-20 mEq/hour (max 40 mEq/hour in severe cases under cardiac monitoring).
Note: Oral: Take with or after food with a full glass of water to minimize GI irritation. Do NOT crush, chew, or suck modified-release tablets/capsules. IV: MUST BE DILUTED. Never give IV push or bolus. Use an infusion pump. Monitor ECG and serum potassium during rapid correction.
Potassium is the principal intracellular cation (140-150 mEq/L). Potassium Chloride administration corrects the deficit of intracellular and extracellular potassium. It is critical for maintaining the resting membrane potential of cells, particularly nerve and muscle cells. By restoring serum potassium levels, it normalizes the ratio of intracellular to extracellular potassium, which is essential for proper cardiac action potential generation and conduction.
Pregnancy: Category C (US FDA). Potassium crosses the placenta. Use only if clearly needed, such as for treatment of hypokalemia. Maternal hypokalemia can be harmful. Benefits generally outweigh risks.
Driving: No known effects. However, severe hypokalemia or hyperkalemia can cause muscle weakness or cardiac symptoms that could impair ability.
| ACE Inhibitors (e.g., Ramipril, Enalapril) | Increased risk of hyperkalemia due to reduced aldosterone. | Major |
| Angiotensin II Receptor Blockers (ARBs e.g., Telmisartan, Losartan) | Increased risk of hyperkalemia. | Major |
| Potassium-Sparing Diuretics (e.g., Spironolactone, Amiloride) | Additive hyperkalemic effect. | Major |
| NSAIDs (e.g., Ibuprofen, Diclofenac) | May reduce renal potassium excretion, increasing risk of hyperkalemia. | Moderate |
| Heparin | Can inhibit aldosterone synthesis, increasing potassium levels. | Moderate |
| Digoxin | Hypokalemia potentiates digoxin toxicity. KCl is used to treat this, but overcorrection can be dangerous. | Major |
| Beta-2 Agonists (e.g., Salbutamol) | Can cause transient hypokalemia, potentially increasing KCl requirements. | Moderate |
Same composition (Potassium Chloride (NA)), different brands: