Applies to potassium phosphate / sodium phosphate: oral tablet.

Serious side effects

Along with its needed effects, potassium phosphate/sodium phosphate 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 phosphate / sodium phosphate:

Incidence not known

• Bone pain
• convulsions
• decreased urine output
• dizziness
• fast or irregular heartbeat
• headache
• 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

Other side effects

Some side effects of potassium phosphate / sodium phosphate may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects.

Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

Incidence not known

• Diarrhea
• nausea
• stomach pain
• vomiting

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.^[Ref]

Frequency not reported: Gastrointestinal upset (diarrhea, nausea, stomach pain, vomiting), laxative effect^[Ref]

Musculoskeletal

Frequency not reported: Bone and joint pain (possible phosphate-induced osteomalacia), weakness or heaviness of legs, muscle cramps^[Ref]

Nervous system

Frequency not reported: Headaches, dizziness, mental confusion, seizures, numbness/tingling/pain/weakness of hands or feet, numbness or tingling around lips^[Ref]

Cardiovascular

Frequency not reported: Fast or irregular heartbeat^[Ref]

Other

Frequency not reported: Unusual tiredness or weakness, swelling of feet or lower legs, unusual weight gain^[Ref]

Respiratory

Frequency not reported: Shortness of breath or trouble breathing^[Ref]

Metabolic

Frequency not reported: Unusual thirst^[Ref]

Genitourinary

Frequency not reported: Low urine output^[Ref]