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Thioguanine Pregnancy and Breastfeeding Warnings

Medically reviewed by Last updated on Apr 11, 2023.

Thioguanine is also known as: Tabloid

Thioguanine Pregnancy Warnings

Use should be avoided.

AU TGA pregnancy category: D
US FDA pregnancy category: D

-This drug can harm a developing fetus.
-Adequate methods of contraception should be encouraged.
-If this drug is used during pregnancy, or if the patient becomes pregnant while taking this drug, the patient should be apprised of the potential harm to the fetus.
-Women of childbearing potential should be advised to avoid becoming pregnant.
-There have been cases where men who have received combinations of cytotoxic agents including this drug have fathered children with congenital abnormalities.

Animal studies have revealed evidence of embryotoxicity, teratogenicity, and mutagenicity. There are no controlled data in human pregnancy. It is not known whether this drug can cause fetal harm or adversely affect reproductive capacity in humans.

AU TGA pregnancy category D: Drugs which have caused, are suspected to have caused or may be expected to cause, an increased incidence of human fetal malformations or irreversible damage. These drugs may also have adverse pharmacological effects. Accompanying texts should be consulted for further details.

US FDA pregnancy category D: There is positive evidence of human fetal risk based on adverse reaction data from investigational or marketing experience or studies in humans, but potential benefits may warrant use of the drug in pregnant women despite potential risks.

See references

Thioguanine Breastfeeding Warnings

A decision should be made to discontinue breastfeeding or discontinue the drug, taking into account the importance of the drug to the mother.

Excreted into human milk: Unknown
Excreted into animal milk: Data not available

- Because of the potential for tumorigenicity shown for this drug, breastfeeding during therapy should be avoided.

See references

References for pregnancy information

  1. Product Information. Tabloid (thioguanine). Prasco Laboratories. 2001.

References for breastfeeding information

  1. Product Information. Tabloid (thioguanine). Prasco Laboratories. 2001.

Further information

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