Last update March 28, 2014

Xenon -127

Low Risk

Possibly safe. Probably compatible. Mild risk possible. Follow up recommended. Read the Comment.

They are radioactive isotopes of Xenon, a noble or inert gas present in the atmosphere to a small extent. It is used to measure blood flow of lungs and brain.
Theoretically, half-life span (radioactivity) of X-133 is 5 days, and, X-127 is 36 days, but, because it is an inert gas it can not be accumulated, thus its actual half-life span = 0. It is exhaled within few minutes. The mother should wait just for few minutes before resuming BF.


We do not have alternatives for Xenon -127.

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. The pharmaceutical industry contraindicates breastfeeding, mistakenly and without scientific reasons, in most of the drug data sheets.

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

Xenon -127 is also known as Xenon -133.


  1. ICRP. Radiation dose to patients from radiopharmaceuticals. Addendum 3 to ICRP Publication 53. ICRP Publication 106. Annex D. Recommendations on breast-feeding interruptions, p. 163-165. Ann ICRP. 2008 Abstract Full text (link to original source) Full text (in our servers)

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