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Twin-K Side Effects

Generic name: potassium citrate

Medically reviewed by Last updated on July 28, 2020.

Note: This document contains side effect information about potassium citrate. Some of the dosage forms listed on this page may not apply to the brand name Twin-K.

For the Consumer

Applies to potassium citrate: oral tablet extended release

Side effects requiring immediate medical attention

Along with its needed effects, potassium citrate (the active ingredient contained in Twin-K) may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur while taking potassium citrate:

Incidence not known

Get emergency help immediately if any of the following symptoms of overdose occur while taking potassium citrate:

Symptoms of overdose

  • Abdominal or stomach pain
  • confusion
  • difficult breathing
  • irregular heartbeat
  • nervousness
  • numbness or tingling in the hands, feet, or lips
  • shortness of breath
  • weakness or heaviness of the legs

For Healthcare Professionals

Applies to potassium citrate: compounding powder, oral liquid, oral tablet extended release


Postmarketing reports: Gastrointestinal complaints (e.g. abdominal discomfort, vomiting, diarrhea, loose bowel movements, nausea)[Ref]


1. "Product Information. Urocit-K (potassium citrate)." Mission Pharmacal Company, San Antonio, TX.

Frequently asked questions

More about Twin-K (potassium citrate)

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Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Some side effects may not be reported. You may report them to the FDA.