Potassium%2525252525252525252525252525252525252525252525252525252525252525252525252525252520chloride

# Potassium Chloride ## Overview Potassium chloride (KCL) is an electrolyte replacement used to treat or prevent hypokalemia. It is available in oral and intravenous formulations. ## Primary Indications * Treatment and prevention of hypokalemia. ## Adult Dosing * **Oral:** * **Prevention:** 20 mEq (10 mmol) per day, divided into one or two doses. * **Treatment:** 40-100 mEq (20-50 mmol) per day, divided into two to four doses. Maximum oral dose generally **100 mEq (50 mmol) per day**. * **Intravenous (IV):** * Dosing depends on the severity of hypokalemia and patient status. **Specific IV infusion rates and concentrations are critical and often guided by local protocol and continuous cardiac monitoring.** * Concentrations exceeding 10 mEq/100 mL and rates exceeding 10 mEq/hour in peripheral lines can cause phlebitis and extravasation injury. * **Central venous administration is preferred for higher doses or concentrations.** * **Maximum infusion rate:** Generally **20 mEq/hour** in adults. Higher rates (up to 40 mEq/hour) may be used in severe, life-threatening hypokalemia with continuous ECG monitoring and in an intensive care setting. * **Maximum concentration:** Generally **40 mEq/100 mL** in peripheral lines and **up to 200 mEq/L** in central lines. Always verify local institutional guidelines. ## Pediatric Dosing * **Oral:** * **Prevention:** 1-2 mEq/kg/day, maximum **20 mEq (10 mmol) per day**. * **Treatment:** 2-5 mEq/kg/day, divided into two to four doses, maximum **40 mEq (20 mmol) per day**. * **Intravenous (IV):** * **Prevention:** 1 mEq/kg/day. * **Treatment:** 2-4 mEq/kg/day. * **Maximum infusion rate:** Generally **0.5-1 mEq/kg/hour**, maximum **20 mEq/hour**. Higher rates may be used in critical situations with close monitoring. * **Maximum concentration:** Typically **40 mEq/L**. ## Dose Adjustments * Renal impairment: Use with extreme caution. Monitor serum potassium closely. In severe renal impairment, potassium supplementation may be contraindicated. ## Contraindications * Hyperkalemia. * Conditions which may predispose to hyperkalemia (e.g., severe renal impairment, untreated Addison's disease, extensive tissue injury, certain medications). * Known hypersensitivity to potassium chloride. ## Adverse Effects * **Gastrointestinal (Oral):** Nausea, vomiting, abdominal pain, diarrhea. Esophageal or gastric irritation/perforation (especially with undissolved tablets or capsules). * **Cardiovascular (IV):** Arrhythmias, cardiac arrest (especially with rapid infusion or hyperkalemia). * **General:** Hyperkalemia (most serious adverse effect), muscle weakness, paresthesia, confusion, mental confusion, paralysis. ## Key Drug Interactions * **Potassium-sparing diuretics (e.g., spironolactone, amiloride, triamterene):** Increased risk of hyperkalemia. * **ACE inhibitors and ARBs (e.g., lisinopril, losartan):** Increased risk of hyperkalemia. * **NSAIDs:** May reduce potassium excretion, increasing risk of hyperkalemia. * **Heparin:** May impair potassium excretion, increasing risk of hyperkalemia. * **Digoxin:** Hyperkalemia can potentiate digoxin toxicity. Hypokalemia can increase the risk of digoxin toxicity. ## Monitoring * Serum electrolytes, particularly serum potassium, frequently. * Renal function (BUN, creatinine). * ECG for signs of hyperkalemia (tall, peaked T waves, widened QRS complex), especially with IV administration or in patients with risk factors for hyperkalemia. * Fluid balance and urine output. ## Clinical Pearls * Oral potassium chloride should be taken with food or meals and with plenty of fluids to minimize gastrointestinal irritation. * Liquid formulations are often preferred over wax matrix tablets to reduce gastrointestinal distress and risk of esophageal injury. * Rapid IV infusion of potassium can be fatal. Always verify infusion rate and concentration. * Correcting severe hypokalemia, especially in patients with cardiac disease or those on digoxin, should be done cautiously and often under intensive monitoring. *** **Disclaimer:** This information is intended for clinical use and is not a substitute for professional medical judgment. Always consult the current official prescribing information and institutional guidelines before administering any medication.