Potassium Phosphate / Sodium Phosphate Dosage

Medically reviewed by Drugs.com. Last updated on Aug 4, 2023.

Usual Adult Dose for Hypophosphatemia

1 or 2 tablets/capsules orally four times a day (with meals and bedtime)

Comments:

• As a phosphorous supplement, each tablet supplies 25% of the US Recommended Daily Allowance (US RDA) of phosphorous for adults.

Use(s): Increase urinary phosphate and pyrophosphate; phosphorous supplement

Usual Adult Dose for Urinary Acidification

1 or 2 tablets/capsules orally four times a day (with meals and bedtime)

Comments:

• As a phosphorous supplement, each tablet supplies 25% of the US Recommended Daily Allowance (US RDA) of phosphorous for adults.

Use(s): Increase urinary phosphate and pyrophosphate; phosphorous supplement

Usual Pediatric Dose for Hypophosphatemia

4 years and older: 1 tablet orally four times a day (with meals and bedtime)

Comments:

• As a phosphorous supplement, each tablet supplies 25% of the US Recommended Daily Allowance (US RDA) of phosphorous for children over 4 and adults.

Uses: Increase urinary phosphate and pyrophosphate; phosphorous supplement

Usual Pediatric Dose for Urinary Acidification

4 years and older: 1 tablet orally four times a day (with meals and bedtime)

Comments:

• As a phosphorous supplement, each tablet supplies 25% of the US Recommended Daily Allowance (US RDA) of phosphorous for children over 4 and adults.

Uses: Increase urinary phosphate and pyrophosphate; phosphorous supplement

Renal Dose Adjustments

Contraindicated in severe renal impairment (renal function less than 30% of normal)

Liver Dose Adjustments

Use with caution

Dose Adjustments

Laxative effect:

• Occasionally, some patients experience a mild laxative effect the first few days of phosphate therapy.
• If lactation persists to an unpleasant degree, reduce the daily dose until it subsides, or discontinue the medication if necessary.

Precautions

CONTRAINDICATIONS:

• Infected phosphate stones in the urinary tract
• Severely impaired renal function (less than 30% of normal)
• Hyperphosphatemia

Consult WARNINGS section for additional precautions.

Dialysis

Data not available

• Contraindicated in severe renal impairment (renal function less than 30% of normal)

Other Comments

Administration advice:

• Tablets should be taken with a full glass of water, with meals and at bedtime.

Storage requirements:

• Store at room temperature; protect from light and moisture

Monitoring:

• Periodically monitor renal function and serum calcium, phosphorous, potassium, and sodium.

Patient advice:

• Advise patients to avoid antacids containing aluminum, magnesium, or calcium as they may prevent phosphate absorption.
• Warn patients of the risk of passing old kidney stones when therapy is started.

See also:

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

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