(Generic versions may still be available.)
Micro-K (potassium chloride extended-release) ® Extencaps® capsules / Micro-K® 10
(Potassium Chloride Extended-release Capsules, USP)
600 mg (8 mEq K)/750 mg (10 mEq K)
- Patient Information:
Details with Side Effects
Micro-K (potassium chloride extended-release) ® Extencaps® capsules and Micro-K (potassium chloride extended-release) ® 10 Extencaps® capsules are oral dosage forms of microencapsulated potassium chloride containing 600 and 750 mg, respectively, of potassium chloride USP equivalent to 8 and 10 mEq of potassium.
Dispersibility of potassium chloride (KCl) is accomplished by microencapsulation and a dispersing agent. The resultant flow characteristics of the KCl microcapsules and the controlled release of K+ ions by the microcapsular membrane are intended to avoid the possibility that excessive amounts of KCl can be localized at any point on the mucosa of the gastrointestinal tract.
Each crystal of KCl is microencapsulated by a patented process with an insoluble polymeric coating which functions as a semi-permeable membrane; it allows for the controlled release of potassium and chloride ions over an eight-to-ten-hour period. Fluids pass through the membrane and gradually dissolve the potassium chloride within the micro-capsules. The resulting potassium chloride solution slowly diffuses outward through the membrane. Micro-K (potassium chloride extended-release) ® and Micro-K (potassium chloride extended-release) ® 10 are electrolyte replenishers. The chemical name of the active ingredient is potassium chloride and the structural formula is KCl. Potassium chloride USP occurs as a white, granular powder or as colorless crystals. It is odorless and has a saline taste. Its solutions are neutral to litmus. It is freely soluble in water and insoluble in alcohol.
The inactive ingredients are edible ink, ethylcellulose, FD&C blue #2 aluminum lake, FD&C yellow #6, gelatin, magnesium stearate, sodium lauryl sulfate, titanium dioxide. May contain FD&C red #40 and yellow #6 aluminum lakes.
What are the possible side effects of potassium chloride?
Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
Stop using this medication and call your doctor at once if you have any of these serious side effects:
- confusion, anxiety, feeling like you might pass out;
- uneven heartbeat;
- extreme thirst, increased urination;
- leg discomfort;
- muscle weakness or limp feeling;
- numbness or tingly feeling in your hands or feet, or around your mouth;
- severe stomach pain, ongoing diarrhea...
What are the precautions when taking potassium chloride extended-release (Micro-K)?
Before taking potassium, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
This medication should not be used if you have certain medical conditions. Before using this medicine, consult your doctor or pharmacist if you have: high potassium blood levels, severe kidney disease (e.g., chronic kidney failure, inability to make urine), adrenal gland problems, severe conditions of tissue breakdown (e.g., severe burns, traumatic injury).
Due to rare reports of stomach/intestinal ulcers and bleeding with sustained-release potassium chloride products, the capsules/tablets should be used only in...
Last reviewed on RxList: 6/19/2007
This monograph has been modified to include the generic and brand name in many instances.
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