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Acetaminophen Pregnancy and Breastfeeding Warnings

Acetaminophen is also known as: Acephen, Aceta, Actamin, Altenol, Arthritis Pain Relief, Atasol, Children's Tylenol, Cipla Genpharm Paracetamol, Doliprane, Mapap, Ofirmev, Panadol, Panadol Osteo, Panamax, Paracetamol, Paracetamol Ranbaxy, Perfalgan, Q-Pap, Silapap Childrens, Tactinal, Taminol, Tempra, Tylenol, Tylenol Arthritis Pain, Tylenol Extra Strength

Acetaminophen Pregnancy Warnings

In pregnant rats receiving oral drug during organogenesis, fetotoxicity and dose-related increases in bone variations (reduced ossification and rudimentary rib changes) were observed. Areas of necrosis in both the liver and kidney of pregnant rats and fetuses were observed when pregnant rats were given oral drug throughout gestation at doses 1.2 times the maximum human daily dose. Animal studies using the IV formulation have not been performed. Epidemiologic data, including a population based case-control study from the National Birth Defects Prevention Study (n= 11,610) and data from 26,424 live singleton births have shown no increased risk of major birth defects in children with first trimester prenatal exposure. In 2015, the US Food and Drug Administration released results of their evaluation on published research studies looking at mothers who took this drug as either an over the counter or prescription product at any time during their pregnancy and the risk of attention deficit hyperactivity (ADHD) in their babies. They found all studies reviewed had potential limitations in their designs that prevented drawing reliable conclusions. AU TGA pregnancy category A: Drugs which have been taken by a large number of pregnant women and women of childbearing age without any proven increase in the frequency of malformations or other direct or indirect harmful effects on the fetus having been observed. US FDA pregnancy category C: Animal reproduction studies have shown an adverse effect on the fetus and there are no adequate and well-controlled studies in humans, but potential benefits may warrant use of the drug in pregnant women despite potential risks.

Benefit should outweigh risk AU TGA pregnancy category: A US FDA pregnancy category: C

See references

Acetaminophen Breastfeeding Warnings

Caution is recommended. Excreted into human milk: Yes Comments; -This drug has been used without apparent harmful effects. -This drug is considered compatible with breastfeeding by the American Academy of Pediatrics.

This drug is excreted into breast milk in very small amounts. Peak levels occur 1 to 2 hours after dosing and are undetectable after 12 hours. An infant ingesting 90 mL of breast milk every 3 hours would receive an average of 0.14% (range 0.04% to 0.23%) of the mother's dose; calculated to be a maximum maternal weight-adjusted dose of around 2%. One case of a maculopapular rash has been reported in a 2-month old nursing infant.

See references

References for pregnancy information

  1. "Product Information. Ofirmev (acetaminophen)." Cadence Pharmaceuticals Inc, San Diego, CA.
  2. Cerner Multum, Inc. "Australian Product Information." O 0
  3. U.S. Food and Drug Administration U.S. Food and Drug Administration U.S. Food and Drug Administration U.S. Food and Drug Administration "FDA Drug Safety Communication: FDA has reviewed possible risks of pain medicine use during pregnancy Available from: URL:" (01/09/2015):

References for breastfeeding information

  1. Cerner Multum, Inc. "Australian Product Information." O 0
  2. United States National Library of Medicine "Toxnet. Toxicology Data Network. Available from: URL:" ([cited 2013 -]):
  3. Committee on Drugs, 1992 to 1993 "The transfer of drugs and other chemicals into human milk." Pediatrics 93 (1994): 137-50
  4. "Product Information. Ofirmev (acetaminophen)." Cadence Pharmaceuticals Inc, San Diego, CA.

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