Potassium Chloride (150mg) is an essential electrolyte supplement used to treat and prevent hypokalemia (low blood potassium levels). 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 prescribed due to dietary insufficiencies and as an adjunct to diuretic therapy, particularly with loop and thiazide diuretics which cause potassium wasting.
Adult: Treatment: 20-100 mEq (1.5g - 7.5g KCl) per day in 2-4 divided doses. Prevention: 20-40 mEq (1.5g - 3g KCl) per day. The 150mg tablet provides ~2 mEq of potassium. Typical dose: 1-2 tablets (150-300mg), 2 to 4 times daily with meals and a full glass of water. MUST be individualized based on serum potassium levels.
Note: ORAL: Take with or immediately after food and a full 8-ounce (240 mL) glass of water to minimize GI irritation. Do NOT crush, chew, or suck on tablets (especially enteric-coated or sustained-release). Swallow whole. LIQUID: Dilute in at least 4 ounces (120 mL) of water or juice. IV: MUST be diluted appropriately (typically not exceeding 40 mEq/L) and infused slowly. NEVER give IV push.
Potassium is the principal intracellular cation (140-150 mEq/L). Potassium Chloride administration corrects a deficiency of potassium ions. It is critical for maintaining the resting membrane potential of cells, particularly nerve and muscle cells. By restoring intracellular potassium levels, it normalizes the ratio of intracellular to extracellular potassium, which is essential for the generation and conduction of action potentials.
Pregnancy: Category A (Australian categorization) / Category C (US FDA). Potassium chloride is considered safe when used to treat a documented deficiency. It crosses the placenta. Use only if clearly needed and under close monitoring, as pregnancy can alter renal function and electrolyte balance.
Driving: No known effects on driving ability. However, severe hypokalemia or hyperkalemia can cause muscle weakness or cardiac symptoms that could impair driving.
| Potassium-Sparing Diuretics (Spironolactone, Triamterene, Amiloride) | Additive hyperkalemia risk | Major |
| ACE Inhibitors (Enalapril, Ramipril) | Increased risk of hyperkalemia by reducing aldosterone | Major |
| Angiotensin II Receptor Blockers (ARBs: Losartan, Telmisartan) | Increased risk of hyperkalemia | Major |
| NSAIDs (Ibuprofen, Diclofenac) | May reduce renal potassium excretion, increasing hyperkalemia risk | Moderate |
| Heparin (including LMWH) | Can inhibit aldosterone synthesis, leading to hyperkalemia | Moderate |
| Digoxin | Hypokalemia potentiates digoxin toxicity. Potassium correction reduces this risk. Conversely, hyperkalemia can worsen certain digoxin-induced arrhythmias. | Major |
| Non-Potassium Sparing Diuretics (Furosemide, Hydrochlorothiazide) | Increase potassium loss, necessitating supplementation | Moderate |
Same composition (Potassium Chloride (150mg)), different brands: