Last update March 4, 2024

Astemizole

Limited compatibility

Unsafe. Moderate/severe adverse effects. Compatible under certain circumstances. Follow-up recommended. Use safer alternative or discontinue breastfeeding from 5 to 7 T ½ . Read Commentary.

Astemizole is a second generation antihistamine, piperidine derivative without sedative or antimuscarinic action. It is indicated for the symptomatic relief of allergic rhinitis and conjunctivitis and urticaria. Oral administration once a day.

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

Its pharmacokinetic data (large volume of distribution, moderately high molecular weight and high percentage of binding to plasma proteins) make it unlikely to pass into breast milk in clinically significant amounts.

20% of infants (2 of 10) breast-fed by mothers taking astemizole had symptoms of irritability (Ito 1993). 

It is a very long-lasting antihistamine because the half-life of its active metabolite is 10 to 20 days.

It has been withdrawn from the market in most countries due to the risk of adverse effects such as ventricular arrhythmia.

Alternatives

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

Astemizole in other languages or writings:

Group

Astemizole belongs to this group or family:

Tradenames

Main tradenames from several countries containing Astemizole in its composition:

Pharmacokinetics

Variable Value Unit
Molecular weight 459 daltons
Protein Binding 97 %
VD 3.6 l/Kg
Tmax 1 hours
24 (metabol: 240 - 480) hours

References

  1. Slater JW, Zechnich AD, Haxby DG. Second-generation antihistamines: a comparative review. Drugs. 1999 Jan;57(1):31-47. Abstract
  2. Ito S, Blajchman A, Stephenson M, Eliopoulos C, Koren G. Prospective follow-up of adverse reactions in breast-fed infants exposed to maternal medication. Am J Obstet Gynecol. 1993 May;168(5):1393-9. Abstract

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