Generic name: Potassium chloride.

Other brand names: Cena-K, K+10, Kaochlor, KAON-CL, K-DUR, Kay Ciel, Kato, Klor-Con, K-Lease, Klorvess, Klotrix, K-Lyte, K-Norm, K-Tab, Rum-K, Slow-K, Ten-K.

Micro-K is a potassium replacement. 

Quick Facts About Micro-K


Used to treat or prevent low potassium levels when taking digoxin (Lanoxin) and non-potassium-sparing diuretics such as Diuril and Dyazide, and certain diseases. Prescribed when potassium chloride in liquid or effervescent forms cannot be tolerated.

Micro-K Dosage

Take with meals and with water or other liquid. Should not crush, chew, or suck capsule. If you have trouble swallowing capsule, doctor may advise sprinkling contents onto a spoonful of soft food. Do not change brands unless directed by your doctor.

  • Usual adult dose: to treat low potassium levels — ranges from 4 to 12 tablets or capsules per day, depending on brand. Doctor will specify exact dose. To prevent low potassium levels — ranges from 2 to 3 tablets or capsules per day, depending on brand. Doctor will specify exact dose. If taking more than 2 tablets or capsules per day, will be divided into smaller doses.
  • Usual child dose: not generally prescribed for children.
  • Missed dose: take as soon as possible, up to 2 hours past regular schedule. Otherwise, do not take missed dose, go back to regular schedule. Do not double doses.

Micro-K Side Effects

Overdose symptoms:

blood in stools, cardiac arrest, irregular heartbeat, muscle paralysis, muscle weakness. Early stages of overdose may not show noticeable symptoms. If you suspect an overdose, immediately seek medical attention.

Overdose can be fatal.

Side effects: abdominal pain or discomfort, diarrhea, nausea, stomach and intestinal ulcers and bleeding, blockage or perforation, vomiting.

No known less common or rare Micro-K side effects.


Inform your doctor before combining Micro-K with:

caantispasmodics such as Bentyl, ACE inhibitors such as Vasotec and Capoten, digoxin (Lanoxin), potassium-sparing diuretics such as Midamor and Aldactone.

Inform your doctor if you are using salt substitutes. 

Special Cautions

Generally considered safe during pregnancy or breastfeeding.

No special precautions apply to seniors.

Not generally prescribed for children.

  • Inform your doctor before Micro-K therapy if you have ever had: acute dehydration, heat cramps, adrenal insufficiency, diabetes, heart disease, kidney disease, liver disease, ulcers, or severe burns.
  • Immediately contact your doctor if you experience black or tarry stools.
  • If taking medication or have a condition that stops or slows Micro-K as it goes through intestinal tract, should not take.
  • Avoid use if you have high potassium levels.


HealthSurvey.org provides accurate and independent information prescription pills, over-the-counter medicines and natural products. This material is provided for educational purposes only and is not intended for medical advice, diagnosis or treatment. If you have questions about  dosage, or Micro-K side effects, please contact your healthcare provider.