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Twin-K Side Effects

Generic name: potassium citrate

Medically reviewed by Last updated on Aug 24, 2022.

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

Applies to potassium citrate: oral tablet extended release.

Serious side effects of Twin-K

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]

Frequently asked questions

More about Twin-K (potassium citrate)

Patient resources

Other brands


Professional resources

Related treatment guides


1. "Product Information. Urocit-K (potassium citrate)." Mission Pharmacal Company (2019):

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.