Last update Oct. 1, 2023


Likely Compatibility

Fairly safe. Mild or unlikely adverse effects. Compatible under certain circumstances. Follow-up recommended. Read Commentary.

Alosetron is a 5-HT3 antagonist used for the treatment of irritable bowel syndrome (IBS) with predominantly severe diarrhea in women. Oral administration twice daily.

At the time of the last update, we found no published data on its excretion in breast milk.

Its pharmacokinetic data (very large volume of distribution and mode high percentage of binding to plasma proteins) make it unlikely to pass into breast milk in clinically significant quantities.

Its low oral bioavailability (even lower if taken with food) makes it difficult to pass into infant plasma from ingested breast milk, except in premature infants and the immediate neonatal period where there may be greater intestinal permeability.

Possible exposure can be decreased by waiting 3 hours after taking the drug to resume breastfeeding.


We do not have alternatives for アロセトロン塩酸塩.

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

アロセトロン塩酸塩 is Alosetron Hydrochloride in Japanese.

Is written in other languages:


アロセトロン塩酸塩 belongs to this group or family:


Main tradenames from several countries containing アロセトロン塩酸塩 in its composition:


Variable Value Unit
Oral Bioavail. 50 - 60 %
Molecular weight 331 daltons
Protein Binding 82 %
VD 0.9 - 1.4 l/Kg
pKa 13.32 -
Tmax 1 hours
1.5 hours


  1. Alosetron Data Sheet 2010 Full text (in our servers)
  2. Mahadevan U, Kane S. American gastroenterological association institute technical review on the use of gastrointestinal medications in pregnancy. Gastroenterology. 2006 Jul;131(1):283-311. Review. Abstract Full text (link to original source) Full text (in our servers)
  3. Andresen V, Hollerbach S. Reassessing the benefits and risks of alosetron: what is its place in the treatment of irritable bowel syndrome? Drug Saf. 2004 Abstract

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