potassium acid phosphate at a glance
Medicine class
Electrolyte replacement
Route
Intravenous infusion after dilution
Key monitoring
Electrolytes, kidney function and sometimes the ECG
What is potassium acid phosphate used for?
The selected UK product is licensed as a source of potassium and phosphate ions in electrolyte replacement therapy.
Replacing potassium and phosphate when intravenous electrolyte replacement is clinically required.
How does potassium acid phosphate work?
The infusion supplies potassium, which supports electrical activity in nerves, muscles and the heart, and phosphate, which participates in energy handling and many metabolic and enzyme reactions.
How to take potassium acid phosphate
This product is not taken by mouth. A healthcare professional must dilute and thoroughly mix the concentrate in a larger volume of suitable fluid before giving it slowly into a vein. Solutions containing calcium or magnesium require particular compatibility checks because a precipitate may form.
Do not inject the undiluted concentrate.
Tell staff about all medicines and supplements you use.
Food does not affect administration because the product is given intravenously.
potassium acid phosphate side effects
Get urgent medical advice
- Fluid retention, such as swollen feet or lower legs with weight gain
- High potassium, which may cause weakness, tingling, breathing difficulty or an irregular or slow heartbeat
- High phosphate or low calcium, potentially causing muscle cramps, tingling or tetany
- Confusion, seizures, increased thirst, dizziness or reduced urination associated with electrolyte disturbance
potassium acid phosphate in pregnancy
Adequate controlled pregnancy studies are unavailable. Use during pregnancy should therefore be decided by the treating clinician after considering the need for electrolyte replacement and appropriate monitoring.
potassium acid phosphate while breastfeeding
It is not known whether administered phosphate is excreted in breast milk, although problems in breastfed infants were not documented in the product information. The prescriber should assess the clinical need and maternal and infant circumstances.
potassium acid phosphate interactions
Interactions are particularly important when another treatment affects potassium, kidney function, heart rhythm or urinary acidity.
Potassium-containing medicines or supplements
Combined use may cause high blood potassium, so potassium monitoring is required.
ACE inhibitors, including captopril, enalapril and lisinopril
These can increase the risk of potassium accumulation.
Potassium-sparing diuretics
Combined use can increase the risk of high blood potassium.
Common questions about potassium acid phosphate
Answers are fully visible for fast scanning and source review.
What is potassium acid phosphate used for?
It supplies potassium and phosphate during intravenous electrolyte replacement therapy.
Can potassium acid phosphate be taken by mouth?
The selected product is an intravenous concentrate and must not be swallowed or self-injected.
Why are blood tests needed?
Sources
These sources were used to prepare and review this medicine page.
Prepared and reviewed by the iatroX editorial team.