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Olpruva

Generic name: sodium phenylbutyrate

Brand names: Buphenyl, Olpruva, Pheburane

Last updated November 3, 2026 0 views
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What is Olpruva?

Olpruva is used by adults and children to treat urea cycle disorders.

Olpruva can be taken with other medicines and may also require changes in diet.

Olpruva may also be used for reasons not mentioned in this medication guide.

This section was rewritten for readability and reviewed for meaning.

How should I take Olpruva?

Follow all instructions on your prescription label and read all medication guides or instruction sheets. Your doctor may change your dose sometimes. Use the medicine exactly as prescribed.

You may need to follow a special diet. Follow all instructions from your doctor or dietitian. Learn about the foods you should eat or avoid.

Wear a medical alert tag or carry an ID card to inform others that you have a urea cycle disorder.

Doses are based on weight. Your dose may change if you gain or lose weight.

Take Olpruva with food.

Shake the oral powder lightly before mixing it with food.

Measure the dose of sodium phenylbutyrate oral pellets using the supplied measuring device (not a kitchen spoon).

Swallow Olpruva oral pellets immediately with soft food, such as applesauce, or with water, fruit juices, or protein-free infant formulas. Do not chew or mix into liquids.

Do not give or take Olpruva oral suspension and oral pellets through a gastrostomy or nasogastric tube.

Your blood may need to be tested frequently.

Store at room temperature away from moisture and heat. Keep the bottle tightly closed when not in use. Throw away any remaining oral pellets 45 days after first opening the bottle.

This section was rewritten for readability and reviewed for meaning.

Warnings

Use only as directed. Inform your doctor if you are taking other medicines, have other medical conditions, or have allergies.

This section was rewritten for readability and reviewed for meaning.

Before taking this medicine

Olpruva should not be used to treat immediate symptoms of an ammonia build-up.

Tell your doctor if you have:

  • heart problems;
  • high blood pressure;
  • diabetes or a history of fructose intolerance, glucose-galactose malabsorption, or sucrase-isomaltase deficiency (Olpruva oral pellet contains sucrose); or
  • liver or kidney disease.

Tell your doctor if you are pregnant or breastfeeding.

This section was rewritten for readability and reviewed for meaning.

Olpruva side effects

Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Olpruva may cause serious side effects. Call your doctor right away if you have:

  • nervous system problems-- sleepiness, tiredness, feeling light-headed, vomiting, nausea, headache, confusion;
  • low blood potassium-- leg cramps, constipation, irregular heartbeats, fluttering in your chest, increased thirst or urination, numbness or tingling, muscle weakness or limp feeling;
  • heart problems-- swelling, rapid weight gain, feeling short of breath; or
  • signs of infection-- fever, chills, sore throat, body aches, unusual tiredness, loss of appetite, bruising or bleeding.

Common side effects of Olpruva may include:

  • missed menstrual periods or changes in your menstrual periods;
  • loss of appetite;
  • change in body odor; or
  • unusual or unpleasant taste in your mouth.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

This section was rewritten for readability and reviewed for meaning.

What happens if I miss a dose?

Oral pellet: Take the medicine as soon as possible, but skip the missed dose if your next dose is due in less than 3 hours. Do not take two doses at the same time.

Oral suspension, tablets, powder: Take the medicine as soon as possible, but skip the missed dose if it is nearly time for your next dose. Do not take two doses at the same time.

This section was rewritten for readability and reviewed for meaning.

What happens if I overdose?

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.

Follow your doctor's instructions about any restrictions on food, beverages, or activity.

This section was rewritten for readability and reviewed for meaning.

What other drugs will affect Olpruva?

Tell your doctor about all your other medicines, especially:

  • steroids;
  • haloperidol;
  • valproic acid; or
  • probenecid.

This list is not complete. Other drugs may affect Olpruva, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible drug interactions are listed here.

This section was rewritten for readability and reviewed for meaning.

Related medicines

Before you take this medicine: the information on this page is general and may not cover your personal circumstances. Read the label supplied with your medicine and ask a pharmacist or doctor if you are unsure, especially if you are pregnant, breastfeeding, taking other medicines or managing a long-term condition.
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Content is provided for education and is not medical advice. See our medical disclaimer.