K-Phos M.F. Side Effects

Generic name: potassium phosphate / sodium phosphate

Note: This document contains side effect information about potassium phosphate / sodium phosphate. Some of the dosage forms listed on this page may not apply to the brand name K-Phos M.F..

Some side effects of K-Phos M.F. may not be reported. Always consult your doctor or healthcare specialist for medical advice. You may also report side effects to the FDA.

For the Consumer

Applies to potassium phosphate / sodium phosphate: oral powder for reconstitution, oral tablet

Stop taking potassium phosphate and sodium phosphate and seek emergency medical attention if you experience an allergic reaction (difficulty breathing; closing of your throat; swelling of your lips, tongue, or face; or hives).

Other, less serious side effects may also to occur. Nausea, vomiting, stomach pain, and diarrhea are among the most common. These side effects usually lessen after a few days of therapy. Notify your doctor if you develop these side effects.

If you have kidney stones, there is a possibility that you will pass old stones after starting treatment with potassium phosphate and sodium phosphate.

Less commonly, the following side effects have been reported:

• headache;

• dizziness or confusion;

• weakness or heaviness of the legs;

• diarrhea;

• seizures;

• unusual tiredness or weakness;

• muscle cramps;

• numbness, tingling, pain, or weakness of the hands or feet;

• swelling of the feet or lower legs;

• unusual weight gain;

• increased thirst;

• decreased urine; or

• bone or joint pain.

Notify your doctor if you develop any of the side effects listed above.

Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.

For Healthcare Professionals

Applies to potassium phosphate / sodium phosphate: oral powder for reconstitution, oral tablet

Gastrointestinal

There have been reports of a laxative effect occurring over the first few days of therapy. Lowering the dose usually reverses this effect; however, discontinuation of therapy is sometimes necessary.

Gastrointestinal side effects have included a laxative effect.

Gastrointestinal side effects associated with phosphate have included diarrhea, nausea, stomach pain, and vomiting.

Musculoskeletal

Musculoskeletal side effects associated with phosphate have included bone and joint pain, and osteomalacia.

Musculoskeletal side effects associated with potassium and/or sodium have included muscle cramps.

Nervous system

Nervous system side effects associated with potassium and/or sodium have included headache, dizziness, mental confusion, seizures, weakness or heaviness of legs, unusual tiredness or weakness, numbness, tingling, pain, weakness of hands or feet, and numbness or tingling around lips.

Cardiovascular

Cardiovascular side effects associated with potassium and/or sodium have included fast or irregular heartbeat, shortness of breath, troubled breathing, and swelling of feet or lower legs.

Other

Other side effects associated with potassium and/or sodium have included unusual weight gain and unusual thirst.

Renal

Renal side effects associated with potassium and/or sodium have included low urine output.

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