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Telbivudine Pregnancy and Breastfeeding Warnings

Telbivudine is also known as: Tyzeka

Telbivudine Pregnancy Warnings

This drug should be used during pregnancy only if the benefit outweighs the risk to the fetus. AU TGA pregnancy category: B1 US FDA pregnancy category: B Comments: -Exposure to this drug in the second and/or third trimester of pregnancy has been shown to reduce risk of mother-to-infant hepatitis B virus (HBV) transmission if this drug is given to the mother and hepatitis B immune globulin and HBV vaccine are administered to the newborn (on day of birth).

Animal studies have failed to reveal evidence of teratogenicity, embryofetal toxicity, or fetal harm; in pregnant rabbits at plasma levels 37 times higher than levels in humans at therapeutic dose, early deliveries and/or abortions were observed resulting from maternal toxicity (body weight loss). Animal studies have shown that this drug crosses the placenta. There are no controlled data in human pregnancy. To monitor fetal outcomes of pregnant women exposed to this drug, a pregnancy registry has been established. Healthcare providers are encouraged to prospectively register patients. For additional information: AU TGA pregnancy category B1: Drugs which have been taken by only a limited number of pregnant women and women of childbearing age, without an increase in the frequency of malformation or other direct or indirect harmful effects on the human fetus having been observed. Studies in animals have not shown evidence of an increased occurrence of fetal damage. US FDA pregnancy category B: Animal reproduction studies have failed to demonstrate a risk to the fetus and there are no adequate and well-controlled studies in pregnant women.

See references

Telbivudine Breastfeeding Warnings

LactMed: An alternative agent may be preferred, particularly while breastfeeding newborn or preterm infants. -According to some authorities: Breastfeeding is not recommended during use of this drug. Excreted into human milk: Unknown Excreted into animal milk: Yes Comments: -This drug has not been studied in nursing mothers receiving treatment for hepatitis B virus infection.

See references

References for pregnancy information

  1. Matthews SJ "Telbivudine for the management of chronic hepatitis B virus infection." Clin Ther 29 (2007): 2635-53
  2. "Telbivudine (Tyzeka) for chronic Hepatitis B." Med Lett Drugs Ther 49 (2007): 11-2
  3. Keam SJ "Telbivudine." Drugs 67 (2007): 1917-29
  4. Cerner Multum, Inc. "UK Summary of Product Characteristics." O 0
  5. "Product Information. Tyzeka (telbivudine)." IDEC Pharmaceuticals Corporation, San Diego, CA.
  6. Cerner Multum, Inc. "Australian Product Information." O 0

References for breastfeeding information

  1. "Product Information. Tyzeka (telbivudine)." IDEC Pharmaceuticals Corporation, San Diego, CA.
  2. Cerner Multum, Inc. "UK Summary of Product Characteristics." O 0
  3. Cerner Multum, Inc. "Australian Product Information." O 0
  4. United States National Library of Medicine "Toxnet. Toxicology Data Network. Available from: URL:" ([cited 2013 -]):
  5. Matthews SJ "Telbivudine for the management of chronic hepatitis B virus infection." Clin Ther 29 (2007): 2635-53

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