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Phos-NaK

Generic Name: Potassium Phosphate and Sodium Phosphate Powder (poe TASS ee um FOS fate & SOW dee um FOS fate)
Brand Name: Phos-NaK

Medically reviewed: April 4, 2018

Uses of Phos-NaK:

  • It is used to treat or prevent low phosphate levels.

What do I need to tell my doctor BEFORE I take Phos-NaK?

  • If you have an allergy to potassium phosphate, sodium phosphate, or any other part of Phos-NaK (potassium phosphate and sodium phosphate powder).
  • If you are allergic to any drugs like this one, any other drugs, foods, or other substances. Tell your doctor about the allergy and what signs you had, like rash; hives; itching; shortness of breath; wheezing; cough; swelling of face, lips, tongue, or throat; or any other signs.
  • If you have any of these health problems: Kidney disease, high phosphate levels, or infected phosphate stones.

This is not a list of all drugs or health problems that interact with Phos-NaK (potassium phosphate and sodium phosphate powder).

Tell your doctor and pharmacist about all of your drugs (prescription or OTC, natural products, vitamins) and health problems. You must check to make sure that it is safe for you to take Phos-NaK (potassium phosphate and sodium phosphate powder) with all of your drugs and health problems. Do not start, stop, or change the dose of any drug without checking with your doctor.

What are some things I need to know or do while I take Phos-NaK?

  • Tell all of your health care providers that you take Phos-NaK (potassium phosphate and sodium phosphate powder). This includes your doctors, nurses, pharmacists, and dentists.
  • Have blood work checked as you have been told by the doctor. Talk with the doctor.
  • If you are taking a salt substitute that has potassium in it, a potassium-sparing diuretic, or a potassium product, talk with your doctor.
  • If you have kidney stones, you may pass old stones when Phos-NaK (potassium phosphate and sodium phosphate powder) is started. Talk with your doctor.
  • Do not take antacids that have aluminum, magnesium, or calcium in them with Phos-NaK (potassium phosphate and sodium phosphate powder).
  • Tell your doctor if you are pregnant or plan on getting pregnant. You will need to talk about the benefits and risks of using Phos-NaK (potassium phosphate and sodium phosphate powder) while you are pregnant.
  • Tell your doctor if you are breast-feeding. You will need to talk about any risks to your baby.

How is this medicine (Phos-NaK) best taken?

Use Phos-NaK (potassium phosphate and sodium phosphate powder) as ordered by your doctor. Read all information given to you. Follow all instructions closely.

  • Add contents of packet to 2.5 ounces (75 mL) of water or juice. Mix well and drink.

What do I do if I miss a dose?

  • Take a missed dose as soon as you think about it.
  • If it is close to the time for your next dose, skip the missed dose and go back to your normal time.
  • Do not take 2 doses at the same time or extra doses.

See also: Dosage Information (in more detail)

What are some side effects that I need to call my doctor about right away?

WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect:

  • Signs of an allergic reaction, like rash; hives; itching; red, swollen, blistered, or peeling skin with or without fever; wheezing; tightness in the chest or throat; trouble breathing, swallowing, or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.
  • Signs of a high potassium level like a heartbeat that does not feel normal; change in thinking clearly and with logic; feeling weak, lightheaded, or dizzy; feel like passing out; numbness or tingling; or shortness of breath.
  • A fast heartbeat.
  • Very loose stools (diarrhea).
  • Very bad headache.
  • Muscle cramps.
  • Seizures.
  • Shortness of breath, a big weight gain, or swelling in the arms or legs.
  • Feeling very tired or weak.
  • Bone or joint pain.
  • Feeling of heaviness in your arms or legs.
  • Not able to pass urine.
  • More thirst.

What are some other side effects of Phos-NaK?

All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Call your doctor or get medical help if any of these side effects or any other side effects bother you or do not go away:

  • Belly pain.
  • Upset stomach or throwing up.
  • Loose stools (diarrhea).

These are not all of the side effects that may occur. If you have questions about side effects, call your doctor. Call your doctor for medical advice about side effects.

You may report side effects to the FDA at 1-800-FDA-1088. You may also report side effects at http://www.fda.gov/medwatch.

See also: Side effects (in more detail)

If OVERDOSE is suspected:

If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.

How do I store and/or throw out Phos-NaK?

  • Store at room temperature.
  • Store in a dry place. Do not store in a bathroom.
  • Keep all drugs in a safe place. Keep all drugs out of the reach of children and pets.
  • Throw away unused or expired drugs. Do not flush down a toilet or pour down a drain unless you are told to do so. Check with your pharmacist if you have questions about the best way to throw out drugs. There may be drug take-back programs in your area.

Consumer information use

  • If your symptoms or health problems do not get better or if they become worse, call your doctor.
  • Do not share your drugs with others and do not take anyone else's drugs.
  • Keep a list of all your drugs (prescription, natural products, vitamins, OTC) with you. Give this list to your doctor.
  • Talk with the doctor before starting any new drug, including prescription or OTC, natural products, or vitamins.
  • Some drugs may have another patient information leaflet. Check with your pharmacist. If you have any questions about Phos-NaK (potassium phosphate and sodium phosphate powder), please talk with your doctor, nurse, pharmacist, or other health care provider.
  • If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.

Further information

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

Medical Disclaimer

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