PHOS-NaK Side Effects
Generic Name: potassium phosphate / sodium phosphate
Note: This page contains side effects data for the generic drug potassium phosphate / sodium phosphate. It is possible that some of the dosage forms included below may not apply to the brand name PHOS-NaK.
For the Consumer
Applies to potassium phosphate / sodium phosphate: oral tablet
As well as its needed effects, potassium phosphate / sodium phosphate may cause unwanted side effects that require medical attention.
Major Side Effects
If any of the following side effects occur while taking potassium phosphate / sodium phosphate, check with your doctor immediately:Incidence not known:
- Bone pain
- decreased urine output
- fast or irregular heartbeat
- joint pain
- mental confusion
- muscle cramps
- numbness or tingling around the lips
- numbness, tingling, pain, or weakness of the hands or feet
- shortness of breath
- swelling of the feet or lower legs
- troubled breathing
- unusual thirst
- unusual tiredness or weakness
- unusual weight gain
- weakness or heaviness of the legs
Minor Side Effects
Some potassium phosphate / sodium phosphate side effects may not need any medical attention. As your body gets used to the medicine these side effects may disappear. Your health care professional may be able to help you prevent or reduce these side effects, but do check with them if any of the following side effects continue, or if you are concerned about them:Incidence not known:
- stomach pain
For Healthcare Professionals
Applies to potassium phosphate / sodium phosphate: oral powder for reconstitution, oral tablet
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.[Ref]
Gastrointestinal side effects have included a laxative effect.
Gastrointestinal side effects associated with phosphate have included diarrhea, nausea, stomach pain, and vomiting.[Ref]
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.[Ref]
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.[Ref]
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.[Ref]
Other side effects associated with potassium and/or sodium have included unusual weight gain and unusual thirst.[Ref]
Renal side effects associated with potassium and/or sodium have included low urine output.[Ref]
1. "Product Information. K-Phos Neutral (potassium phosphate)." Beach Pharmaceuticals, Tampa, FL.
2. "Product Information. K-Phos M.F. (potassium phosphate-sodium phosphate)." Beach Pharmaceuticals, Tampa, FL.
It is possible that some side effects of PHOS-NaK may not have been reported. These can be reported to the FDA here. Always consult a healthcare professional for medical advice.
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