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You are here : 3-RX.com > Drugs & Medications > Detailed Drug Information (USP DI) > Phosphates

Phosphates (Systemic)

Description and Brand Names | Before Using | Proper Use | Precautions | Side Effects

  • Acidifier, urinary - Potassium and Sodium Phosphates; Monobasic Potassium Phosphates
  • Antiurolithic, calcium calculi - Potassium and Sodium Phosphates; Monobasic Potassium Phosphates
  • Electrolyte replenisher - Potassium and Sodium Phosphates; Potassium Phosphates; Sodium Phosphates

Phosphates are used as dietary supplements for patients who are unable to get enough phosphorus in their regular diet, usually because of certain illnesses or diseases. Phosphate is the drug form (salt) of phosphorus. Some phosphates are used to make the urine more acid, which helps treat certain urinary tract infections. Some phosphates are used to prevent the formation of calcium stones in the urinary tract.

Injectable phosphates are to be administered only by or under the supervision of your health care professional. Some of these oral preparations are available only with a prescription. Others are available without a prescription; however, your health care professional may have special instructions on the proper dose of this medicine for your medical condition. You should take phosphates only under the supervision of your health care professional.

Phosphates are available in the following dosage forms:

  • Potassium Phosphates
    • Capsules for solution (U.S.)
    • Powder for solution (U.S.)
    • Tablets for solution (U.S.)
  • Potassium and Sodium Phosphates
    • Capsules for solution (U.S.)
    • Powder for solution (U.S.)
    • Tablets for solution (U.S. and Canada)
  • Potassium Phosphates
    • Injection (U.S. and Canada)
  • Sodium Phosphates
    • Injection (U.S.)

Importance of Diet

The best dietary sources of phosphorus include dairy products, meat, poultry, fish, and cereal products.

The daily amount of phosphorus needed is defined in several different ways.

    For U.S. -
  • Recommended Dietary Allowances (RDAs) are the amount of vitamins and minerals needed to provide for adequate nutrition in most healthy persons. RDAs for a given nutrient may vary depending on a person's age, sex, and physical condition (e.g., pregnancy).
  • Daily Values (DVs) are used on food and dietary supplement labels to indicate the percent of the recommended daily amount of each nutrient that a serving provides. DV replaces the previous designation of United States Recommended Daily Allowances (USRDAs).
    For Canada -
  • Recommended Nutrient Intakes (RNIs) are used to determine the amounts of vitamins, minerals, and protein needed to provide adequate nutrition and lessen the risk of chronic disease.

Normal daily recommended intakes for phosphorus are generally defined as follows:

Persons U.S.
Infants and children
Birth to 3 years of age
300-800 150-350
4 to 6 years of age 800 400
7 to 10 years of age 800 500-800
Adolescent and adult males 800-1200 700-1000
Adolescent and adult females 800-1200 800-850
Pregnant females 1200 1050
Breast-feeding females 1200 1050

Brand Names

Some commonly used brand names are:

In the U.S. -

  • K-Phos M. F. 2
  • K-Phos Neutral 2
  • K-Phos No. 2 2
  • K-Phos Original 1
  • Neutra-Phos 2
  • Neutra-Phos-K 1
  • Uro-KP-Neutral 2

In Canada -

  • Uro-KP-Neutral 2


For quick reference, the following phosphates are numbered to match the corresponding brand names.

This information applies to the following medicines:
1. Potassium Phosphates (poe-TASS-ee-um FOS-fates)‡§
2. Potassium and Sodium Phosphates (poe-TASS-ee-um and SOE-dee-um FOS-fates)‡§
3. Sodium Phosphates (SOE-dee-umFOS-fates)†‡
† Not commercially available in Canada
‡ Generic name product may be available in the U.S.
§ Generic name product may be available in Canada


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Phosphates: Before Using

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