It is excreted in milk in sufficient quantity to create addiction in the infant (quoted in Eslami 2015 and Cobrinik 1959). Breastfeeding by mothers who are addicted to heroin can cause symptoms of severe respiratory distress with cyanosis, lethargy, poor nutrition or irritability in the infant (Joya 2011, van de Velde 2007) and prevent possible withdrawal symptoms in the infant (Eslami 2015, van de Velde 2007, Godfriend 1956). Long-term physical and psychomotor development may be diminished (Wilson 1979). Heroin increases prolactin levels (Spagnolli 1987) and may cause galactorrhea-amenorrhea syndrome (Pelosi 1974). Illegal psychotropic drugs impair the mother’s ability to care for her child, endangering the life and health of both (Eslami 2015, Joya 2011, Moretti 2000). Co-sleeping with the baby is not recommended if this drug is being taken (UNICEF 2013, Landa 2012, ABM 2008, UNICEF 2006).