Last update May 8, 2022

Carbamide Peroxide

Very Low Risk

Safe. Compatible. Minimal risk for breastfeeding and infant.

Hydrogen peroxide and urea in equimolecular proportions. It acts by releasing hydrogen peroxide and oxygen in contact with moist surfaces. It is used as a tooth whitener, for the topical treatment of infections (skin and mucous membranes) and an ear wax softener.

Since the last update we have not found published data about its excretion in breast milk.

As it is a product which acts locally, the absorption of hydrogen peroxide is zero or minimal since it is metabolized by the peroxides and catalase of the tissues.

Furthermore, hydrogen peroxide and urea are natural components of the body and even breast milk. (Al-Kerwi 2005, Ross 1985, Atkinson 1980)

See below the information of these related products:

  • Hydrogen Peroxide ( Safe. Compatible. Minimal risk for breastfeeding and infant.)
  • Urea ( Safe. Compatible. Minimal risk for breastfeeding and infant.)


We do not have alternatives for Carbamide Peroxide since it is relatively safe.

Suggestions made at e-lactancia are done by APILAM team of health professionals, and are based on updated scientific publications. It is not intended to replace the relationship you have with your doctor but to compound it.

Jose Maria Paricio, Founder & President of APILAM/e-Lactancia

Your contribution is essential for this service to continue to exist. We need the generosity of people like you who believe in the benefits of breastfeeding.

Thank you for helping to protect and promote breastfeeding.

José María Paricio, founder of e-lactancia.

Other names

Carbamide Peroxide is also known as

Carbamide Peroxide in other languages or writings:


Main tradenames from several countries containing Carbamide Peroxide in its composition:


Variable Value Unit
Molecular weight 94 daltons


  1. DDD. Carbamide Peroxide (Otex Ear Drops). Drug Summary. 2015 Full text (in our servers)
  2. Al-Kerwi EA, Al-Hashimi AH, Salman AM. Mother's milk and hydrogen peroxide. Asia Pac J Clin Nutr. 2005 Abstract
  3. Ross SA, Clark RM. Nitrogen distribution in human milk from 2 to 16 weeks postpartum. J Dairy Sci. 1985 Abstract
  4. Atkinson SA, Anderson GH, Bryan MH. Human milk: comparison of the nitrogen composition in milk from mothers of premature and full-term infants. Am J Clin Nutr. 1980 Abstract

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