Micro-K

Discontinued Warning IconPlease Note: This Brand Name drug is no longer available in the US.
(Generic versions may still be available.)

Micro-K (potassium chloride extended-release) ® Extencaps® capsules / Micro-K® 10
EXTENCAPS®
(Potassium Chloride Extended-release Capsules, USP)
600 mg (8 mEq K)/750 mg (10 mEq K)

DRUG DESCRIPTION

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...

Read All Potential Side Effects and See Pictures of Micro-K »

What are the precautions when taking potassium chloride extended-release (Micro-K)?

Before taking potassium, tell your doctor or pharmacist if you have any allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

Before using this medication, tell your doctor or pharmacist your medical history, especially of: heart problems, kidney problems, high levels of potassium in the blood.

Due to rare reports of stomach/intestinal ulcers and bleeding with sustained-release potassium products, taking a liquid form of potassium is preferred. Tell your doctor or pharmacist if you have throat/stomach/intestinal problems such as blockage, narrowing, or ulcers.

Before having surgery, tell your doctor or dentist about all the products you use (including prescription...

Read All Potential Precautions of Micro-K »

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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Micro-K - User Reviews

Micro-K User Reviews

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Report Problems to the Food and Drug Administration

 

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.


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