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Contact a Novo Nordisk Hemophilia Community Liaison (HCL).

Life with a bleeding disorder can bring challenges, questions, and the occasional bump in the road. That’s why Novo Nordisk goes beyond treatment to provide information, education, and resources that might help. Our Hemophilia Community Liaisons (HCLs) are experienced, active in the hemophilia community, and ready to provide you with one-on-one support, including:

  • Information about Tretten® and trial prescriptions
  • Disease and lifestyle education
  • Updates on local events
  • Tools to help you manage your bleeding disorder

Enter your zip code to find your HCL.

Selected Important Safety Information

Who should not use Tretten®?

  • You should not use Tretten® if you have ever had allergic (hypersensitivity) reactions, including severe, whole body reaction (anaphylaxis) to Tretten® or any of the ingredients.

What should I tell my healthcare provider before Tretten® is given?

  • Tell your healthcare provider about all of your medical conditions, including if you are pregnant, think you may be pregnant or planning to become pregnant, are breast feeding, or have a history of blood clots.
  • Tell your healthcare provider and pharmacist about all of the medicines you take, including all prescription and non-prescription medicines such as over-the-counter medicines, supplements, or herbal remedies.

Indications and Usage

What is Tretten® (Coagulation Factor XIII A-Subunit [Recombinant])?

  • Tretten® is an injectable medicine used to prevent bleeding in adults and children who have congenital Factor XIII (FXIII) A-subunit deficiency.
  • Tretten® is not for use in patients with congenital Factor XIII B-subunit deficiency.

Important Safety Information

Who should not use Tretten®?

  • You should not use Tretten® if you have ever had allergic (hypersensitivity) reactions, including severe, whole body reaction (anaphylaxis) to Tretten® or any of the ingredients.

What should I tell my healthcare provider before Tretten® is given?

  • Tell your healthcare provider about all of your medical conditions, including if you are pregnant, think you may be pregnant or planning to become pregnant, are breast feeding, or have a history of blood clots.
  • Tell your healthcare provider and pharmacist about all of the medicines you take, including all prescription and non-prescription medicines such as over-the-counter medicines, supplements, or herbal remedies.

What are the possible side effects of Tretten®?

  • Call your healthcare provider or go to the emergency department right away if you have any of the following symptoms after using Tretten®:
    • Signs of allergic reaction, including shortness of breath, rash, itching (pruritus), redness of the skin (erythema), or fainting/dizziness.
    • Signs of a blood clot including pain, swelling, warmth, redness, or a lump in your legs or arms, chest pain, or sudden severe headache and/or loss of consciousness or function.
    • Unexpected bleeding.
  • Other possible side effects may include pain in your arms or legs, headache, and pain at the injection site.
  • These are not all the possible side effects of Tretten®. Tell your healthcare provider about any side effect that bothers you or that does not go away.

Please click here for Tretten® Prescribing Information.

Tretten® is a prescription medication.

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit www.fda.gov/medwatch, or call 1-800-FDA-1088.