Alprolix prevents and controls major bleeding episodes caused by hemophilia B. May cause changes in taste.

Alprolix Overview

Reviewed: March 31, 2014

Alprolix is a prescription medicine used to control and prevent bleeding episodes in adults and children who have hemophilia B, an inherited bleeding disorder. Alprolix belongs to a group of drugs called antihemophilic agents which work by replacing clotting factors required to stop bleeding that are missing in people with hemophilia B. 

This medication is available in an long acting injectable form to be given directly into a vein (IV) by a healthcare professional.

Common side effects of Alprolix include headache and tingling and/or numbness in the mouth.

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Alprolix Cautionary Labels


Uses of Alprolix

Alprolix is a prescription medication used for:

  • Control and prevention of bleeding episodes,
  • Perioperative management,
  • Routine prophylaxis to prevent or reduce the frequency of bleeding episodes

This medication may be prescribed for other uses. Ask your doctor or pharmacist for more information.


Alprolix Drug Class

Alprolix is part of the drug class:

Side Effects of Alprolix

Serious side effects have been reported with Alprolix. “Drug Precautions” section.

Common side effects of Alprolix include:

  • headache
  • tingling and/or numbness in the mouth
  • bad breath
  • dizziness
  • pain at site of injection
  • low blood pressure

This is not a complete list of Alprolix side effects. Ask your doctor or pharmacist for more information.

Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.

Alprolix Interactions

No Alprolix drug interactions have been reported, however, you should tell your doctor about all the medicines you take including prescription and non-prescription medicines, vitamins, and herbal supplements. Not all drug interactions are known or reported and new drug interactions are continually being reported.

Alprolix Precautions

Serious side effects have been reported with Alprolix including:

  • Hypersensitivity reactions, including anaphylaxis. Tell your healthcare provider right away if you have some or all of the following symptoms:
    • swelling of the face or lips
    • chest tightness
    • a drop in blood pressure
    • lethargy (sluggishness)
    • nausea
    • vomiting
    • tingling in hands or feet
    • restlessness
    • wheezing
    • difficulty breathing
  • Development of proteins that inhibit (stop) the activity of Alprolix. Your healthcare provider will want to monitor for this development.
  • Nephrotic syndrome (kidney damage). Tell your healthcare provider right away if you have some or all of the following symptoms:
    • urine with a foamy appearance
    • poor or decreased appetite
    • swelling around the eyes, feet, and ankles, and in the abdomen (stomach area)
    • weight gain from an increase in fluid in the body
  • Thromboembolic complications. This is a process of blood clot formation. This can be especially dangerous if a blood clot gets stuck in the leg (deep vein thrombosis), the lungs (pulmonary embolism), or if you have a stroke (clotting of a vessel leading to the brain).

 Do not take Alprolix if you:

  • have a known hypersensitivity (allergic reaction) to Alprolix or its ingredients
  • are allergic to hamsters
  • develop disseminated intravascular coagulation (DIC). (DIC is when clotting and bleeding of the blood becomes unbalanced.)
  • develop signs of fibrinolysis. (Fibrinolysis is when your blood loses its ability to clot.)

Alprolix Food Interactions

Medications can interact with certain foods. In some cases, this may be harmful and your doctor may advise you to avoid certain foods. In the case of Alprolix, there are no specific foods that you must exclude from your diet when receiving this medication.

Inform MD

Before taking Alprolix, tell your doctor about all of your medical conditions. Especially tell your doctor if you:

  • have or have had any medical problems
  • have any allergies, including allergies to hamsters
  • are breastfeeding. It is not known if Alprolix passes into your milk and if it can harm your baby.
  • are pregnant or breastfeeding

Tell your doctor about all the medicines you take including prescription and non-prescription medicines, vitamins, and herbal supplements.

Alprolix and Pregnancy

Tell your doctor if you are pregnant or plan to become pregnant.

The FDA categorizes medications based on safety for use during pregnancy. Five categories - A, B, C, D, and X, are used to classify the possible risks to an unborn baby when a medication is taken during pregnancy.

Alprolix falls into category C. No studies have been done in animals, and there are no well-done studies in pregnant women. Alprolix should be given to a pregnant woman only if clearly needed.

Alprolix and Lactation

Tell your doctor if you are breastfeeding or plan to breastfeed.

It is not known whether Alprolix crosses into human milk. Because many medications can cross into human milk and because of the possibility for serious adverse reactions in nursing infants with use of this medication, a choice should be made whether to stop nursing or stop the use of this medication. Your doctor and you will decide if the benefits outweigh the risk of using Alprolix.

Alprolix Usage

Take Alprolix exactly as prescribed.

Alprolix is given directly into the vein. Alprolix should be administered as ordered by your healthcare provider. You should be trained on how to do infusions by your healthcare provider or hemophilia treatment center. Many people with hemophilia B learn to infuse their Alprolix by themselves or with the help of a family member.

You may have to have blood tests done after getting Alprolix to be sure that your blood level of Alprolix  is high enough to clot your blood. Call your healthcare provider right away if your bleeding does not stop after taking Alprolix.

If you miss a dose, take the missed dose as soon as you remember. If it is almost time for the next dose, skip the missed dose and take your next dose at the regular time. Do not take two doses of Alprolix at the same time.

Alprolix Dosage

Take Alprolix exactly as prescribed by your doctor. Follow the directions on your prescription label carefully.

Your healthcare provider will tell you how much Alprolix to use based on your weight, the severity of the factor IX deficiency, the location and extent of bleeding, your clinical condition, age and recovery of factor IX.

Routine prophylaxis with Alprolix: 50 IU/kg once weekly or 100 IU/kg once every 10 days.

  • Dose will be adjusted based on individual response.

Type of Bleeding:

  • Minor and Moderate: 30-60 (IU/dL)
  • Major: 80-100 (IU/dL)

Alprolix Overdose

If you take too much Alprolix call your healthcare provider or local Poison Control Center, or seek emergency medical attention right away.

Other Requirements

  • Store at refrigerated temperature 2° to 8°C (35 to 46°F). Do not freeze.
  • Alprolix vials may also be stored at room temperature up to 30°C (86°F) for a single 6 month period. If you choose to store Alprolix at room temperature:
    • Note on the carton the date on which the product was removed from refrigeration.
    • Use the product before the end of this 6 month period or discard it.
    • Do not return the product to the refrigerator.
  • Do not use after the expiration date printed on the carton or vial.
  • Do not share Alprolix with other people, even if they have the same symptoms as you do.
  • Keep out of reach of children.