Last update March 16, 2014


Very Low Risk

Safe. Compatible. Minimal risk for breastfeeding and infant.

Extracts obtained from rhizomes of ferns, which are called fernblock or “anapses”, contain calagualin and polypodin, and have been traditionally used in Central and South America as a cure of many conditions.

Although some have reported a photo-protective and anti-inflammatory effect definitive evidence is lacking.

Mild side effects like gastric irritation and sedation are recognized but no toxicity has been reported. Sedative effect of anti-hypertension and cardiotonic drugs as well as other plants may be increased when taken with this substance. This precludes its use with the latter medication, or, at higher dose than recommended especially by nursing mothers.


We do not have alternatives for Fern 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. 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

Fern is also known as Calaguala. Here it is a list of alternative known names::


Fern belongs to this group or family:


Main tradenames from several countries containing Fern in its composition:


  1. Murciasalud. ¿Existe evidencia que recomiende el uso de Polypodium Leucotomos o de glicofosfopeptical en el tratamiento preventivo de las infecciones respiratorias de las vías altas recurrentes? Banco de Preguntas Preevid. 2006 Full text (link to original source) Full text (in our servers)

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e-lactancia is a resource recommended by Academy of Breastfeeding Medicine - 2012 of United States of America

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