Cinchona alkaloid used in the prophylaxis and treatment of malaria (Pérez 2009). Administered orally or intravenously. It is excreted in breast milk in clinically insignificant amounts (Mathew 2004, Phillips 1986, Terwilliger 1934), much lower than the dose used in newborns and infants (Fulton 1992).No problems have been observed in infants whose mothers were taking it (FDA 2008, Terwilliger 1934). Its use is authorized in infants and children.Avoid in cases of glucose-6-phosphate dehydrogenase deficiency (Mathew 2004, WHO/UNICEF 2002, Fulton 1992). American Academy of Pediatrics: medication usually compatible with breastfeeding (AAP 2001). WHO list of essential medicines: compatible with breastfeeding (WHO / UNICEF, 2002).