PrescriptionGiant is a FREE prescription savings program that can save you up to 75% on your prescriptions with or without insurance!

Micro-K (Generic Potassium)

Actual product appearance may differ slightly.

Click the CARD below to print or take a screenshot on your mobile phone or tablet. There is no need to download another app!

If you would like to personalize your card enter your full name in the member name field below the card at this link and click the Update button.

Why is this medication prescribed?

Micro-K is a brand name for a medication that contains potassium chloride, which is a form of potassium supplement. It is prescribed to individuals who have low levels of potassium in their blood, a condition known as hypokalemia. Potassium is an essential electrolyte that plays a crucial role in various bodily functions, including muscle contraction, nerve function, and maintaining a stable heart rhythm. When potassium levels in the blood drop below the normal range, it can lead to various symptoms and health problems.

Common reasons for prescribing Micro-K or potassium supplements in general include:

  • Diuretic Use: Certain diuretic medications, also known as water pills, can cause the loss of potassium in the urine. Potassium supplements may be prescribed to counteract this effect.
  • Gastrointestinal Disorders: Conditions like chronic diarrhea, vomiting, or excessive use of laxatives can lead to potassium loss. In such cases, potassium supplements may be needed.
  • Kidney Problems: Individuals with kidney disease or on dialysis may have difficulty maintaining proper potassium levels, and supplements may be prescribed to address this deficiency.
  • Other Medications: Some medications, such as certain corticosteroids and antibiotics, can lower potassium levels, necessitating potassium supplementation.
  • Nutritional Deficiency: Inadequate dietary intake of potassium can also lead to hypokalemia. In such cases, dietary changes and supplements may be recommended.

How should this medicine be used?

Micro-K is available in different forms, including tablets and capsules, and its use should be guided by a healthcare professional. The dosing and frequency of Micro-K or any potassium supplement will depend on the individual’s specific condition and potassium level. It is essential to follow the prescribed dosage instructions carefully.

Here are some general guidelines for using Micro-K:

  • Take as Prescribed: Always take Micro-K exactly as prescribed by your healthcare provider. Do not change the dosage or frequency without their guidance.
  • Swallow Whole: Most Micro-K tablets or capsules should be swallowed whole with a full glass of water. Do not crush, chew, or break them unless your doctor advises otherwise.
  • Timing: It is often recommended to take Micro-K with meals or immediately after eating to minimize the risk of stomach upset.
  • Avoid Overdosing: Do not take more potassium supplement than prescribed, as excessive potassium intake can have adverse effects on the heart and other organs.
  • Regular Monitoring: Your healthcare provider will likely monitor your potassium levels through blood tests to ensure they are within the desired range. Adjustments to your medication may be made based on these results.
  • Follow Dietary Recommendations: In addition to taking supplements, your healthcare provider may recommend dietary changes to help maintain adequate potassium levels.

It’s crucial to inform your healthcare provider about any other medications, supplements, or medical conditions you have, as they can affect how potassium supplements like Micro-K are prescribed and managed in your specific case. Never self-prescribe or use potassium supplements without medical supervision, as excessive potassium intake can be harmful.

Other uses for this medicine

Micro-K, which contains potassium chloride, is primarily prescribed to treat or prevent low blood potassium levels (hypokalemia). However, there may be some off-label uses for Micro-K based on a healthcare provider’s assessment and judgment. These off-label uses could include:

  • Prevention of Hypokalemia: In some cases, Micro-K may be prescribed to individuals who are at risk of developing hypokalemia due to certain medical conditions or medications.
  • Muscle Disorders: In some neuromuscular disorders, potassium supplements may be used as part of a treatment plan to support muscle function.
  • Cardiac Arrhythmias: Potassium supplements may be considered as part of the treatment for certain cardiac arrhythmias (irregular heart rhythms) when low potassium levels are a contributing factor.
  • Dietary Supplementation: Micro-K may be recommended as a dietary supplement for individuals who have difficulty obtaining enough potassium through their diet, though dietary changes are typically the first approach.

What special precautions should I follow?

Special Precautions for Micro-K:

  • Medical Supervision: Micro-K should only be used under the supervision and prescription of a qualified healthcare provider. Do not self-prescribe or change the dosage without consulting your doctor.
  • Allergies: Inform your healthcare provider if you are allergic to any ingredients in Micro-K or if you have had any allergic reactions to potassium supplements in the past.
  • Medical Conditions: Let your healthcare provider know if you have any medical conditions, particularly kidney problems, because impaired kidney function can affect how your body processes potassium.
  • Medication Interactions: Provide a list of all medications, supplements, and over-the-counter drugs you are taking to your healthcare provider. Some medications can interact with potassium supplements, potentially causing adverse effects.
  • Monitoring: Regular blood tests to monitor your potassium levels will likely be necessary while taking Micro-K to ensure that your potassium levels remain within the desired range.
  • Proper Dosage: Take Micro-K exactly as prescribed by your healthcare provider. Do not exceed the recommended dosage, as excessive potassium intake can be harmful.
  • Avoid Crushing or Chewing: Swallow Micro-K tablets or capsules whole with a full glass of water unless your healthcare provider instructs you otherwise.
  • Pregnancy and Breastfeeding: Inform your healthcare provider if you are pregnant, planning to become pregnant, or breastfeeding, as the use of potassium supplements during these times should be carefully monitored.
  • Dietary Considerations: Continue to follow any dietary recommendations provided by your healthcare provider, as dietary changes may also be important in managing potassium levels.
  • Side Effects: Be aware of potential side effects, which may include stomach upset, diarrhea, or other gastrointestinal issues. Report any unusual or severe side effects to your healthcare provider.

Always consult with your healthcare provider regarding the appropriate use of Micro-K or any medication, and follow their guidance closely to ensure your safety and effective treatment.

What special dietary instructions should I follow?

Your doctor may provide specific dietary recommendations based on your individual potassium needs. Some general dietary guidelines for managing potassium levels include:

  • Limit high-potassium foods: If you have been prescribed Micro-K due to high potassium levels, you may need to limit or avoid high-potassium foods such as bananas, oranges, potatoes, tomatoes, and salt substitutes that contain potassium chloride.
  • Read food labels: Pay attention to food labels to identify products that are high in potassium.
  • Maintain a balanced diet: Eating a well-balanced diet can help you manage your potassium levels effectively. A registered dietitian can provide personalized dietary recommendations.

What should I do if I forget a dose?

If you miss a dose of Micro-K, take it as soon as you remember. However, if it is close to the time for your next dose, skip the missed dose and resume your regular dosing schedule. Do not double up on doses to make up for a missed one, as this can lead to excessive potassium levels.

What side effects can this medication cause?

Micro-K, which contains potassium chloride, can cause side effects, especially when not used as directed or when taken in excessive amounts. It’s important to take this medication only under the guidance of a healthcare provider and to follow their prescribed dosage instructions. Common side effects of Micro-K may include:

  • Gastrointestinal Disturbances: Many people experience stomach upset, nausea, vomiting, or diarrhea when taking potassium supplements. Taking Micro-K with meals or a full glass of water can help reduce these side effects.
  • Gastric Ulcers or Irritation: In some cases, the high concentration of potassium in the tablet or capsule may irritate the stomach lining or exacerbate existing gastric ulcers.
  • Gas and Bloating: Flatulence (gas) and abdominal bloating can occur as a side effect of potassium supplements.
  • Hyperkalemia: This is a condition where there is an excessive amount of potassium in the blood. It can lead to serious health issues, including irregular heart rhythms and muscle weakness. It’s typically a result of taking too much potassium, either through excessive supplement use or due to impaired kidney function.
  • Allergic Reactions: In rare cases, individuals may experience allergic reactions to potassium supplements, which can include symptoms like rash, itching, swelling, severe dizziness, or difficulty breathing. Seek immediate medical attention if you suspect an allergic reaction.
  • Tingling or Numbness: Some people may experience tingling or numbness in the extremities (hands and feet) as a side effect of potassium supplementation.
  • Muscle Weakness: Potassium supplements can sometimes lead to muscle weakness or cramps, particularly when taken in excess.
  • High Blood Pressure: In rare cases, potassium supplements may cause elevated blood pressure.
  • Cardiac Arrhythmias: Abnormal heart rhythms, such as bradycardia (slow heart rate) or tachycardia (fast heart rate), can occur if potassium levels in the blood become too high.

It’s important to note that the risk of these side effects is generally low when Micro-K is taken as prescribed by a healthcare provider and monitored through regular blood tests. Your doctor will adjust your dosage to ensure that your potassium levels remain within a safe and therapeutic range.

If you experience any unusual or severe side effects while taking Micro-K, contact your healthcare provider immediately. Additionally, do not change your dosage or discontinue the medication without consulting your healthcare provider, as sudden changes in potassium supplementation can have adverse effects on your health. Your doctor will provide guidance on managing any side effects and adjusting your treatment plan as needed.

What should I know about storage and disposal of this medication?


  • Keep out of Reach of Children: Store Micro-K and all medications out of the reach of children and pets to prevent accidental ingestion.
  • Room Temperature: Store Micro-K at room temperature, away from excessive heat or moisture. Do not freeze the medication.
  • Original Container: Keep Micro-K in its original container with the cap tightly closed. Protect it from light.
  • Separate from Other Medications: Store Micro-K separately from other medications to prevent potential interactions or contamination.


  • Dispose Properly: When you no longer need Micro-K or it has reached its expiration date, dispose of it safely. Do not flush it down the toilet or drain unless instructed to do so by your healthcare provider or a medication disposal program.
  • Medication Take-Back Programs: Check with your local pharmacy or healthcare facility to see if they offer medication disposal programs or take-back options for unused or expired medications.

In case of emergency/overdose

If you suspect an overdose of Micro-K or experience symptoms of hyperkalemia (excessive potassium in the blood), such as irregular heartbeat, muscle weakness, tingling or numbness, confusion, or difficulty breathing, seek immediate medical attention. An overdose of potassium can be life-threatening.

What other information should I know

  • Regular Monitoring: Your healthcare provider will likely schedule regular blood tests to monitor your potassium levels while you are taking Micro-K. It’s essential to attend these appointments and follow up with your healthcare provider as directed.
  • Keep Your Healthcare Provider Informed: Inform your healthcare provider about any new or existing medical conditions, medications, supplements, or dietary changes, as these can affect your potassium levels and may require adjustments to your treatment plan.
  • Avoid Salt Substitutes: Some salt substitutes contain potassium chloride and can significantly increase your potassium intake. Consult your healthcare provider before using such products.
  • Medical Alert: If you experience an emergency, it’s helpful to wear a medical alert bracelet or carry a card indicating that you are taking potassium supplements. This can inform healthcare providers of your medication in case you are unable to communicate during a medical crisis.
  • Follow Dietary Recommendations: If your healthcare provider has given you specific dietary instructions to manage your potassium levels, follow these recommendations closely.
  • Report Side Effects: If you experience any side effects or adverse reactions while taking Micro-K, report them to your healthcare provider promptly.

Always use Micro-K as prescribed by your healthcare provider, and do not make any changes to your treatment plan without consulting them first. The information provided here is for general knowledge, and individual circumstances may vary. Your healthcare provider is the best source of guidance for your specific situation.

Copyright © 2023