University of Adelaide researchers studied the outcomes of 368 women who were on antidepressants prior to becoming pregnant.
They found that women on antidepressant medication are more successful at breastfeeding their babies if they keep taking the medication, compared with women who quit antidepressants because of concerns about their babies' health.
"We found that two thirds of the women (67 per cent) stopped taking their antidepressant medication either after becoming pregnant or during breastfeeding," said Dr Luke Grzeskowiak from the University of Adelaide's Robinson Research Institute.
"In contrast, those women who had stopped taking antidepressants were also more likely to stop breastfeeding within the recommended six months," Grzeskowiak said.
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Grzeskowiak said the health benefits of continued breastfeeding greatly outweigh any perceived risk to the baby from antidepressant medication.
"This is a really important message because we know that breastfeeding has immense benefits for the child and the mum herself, including a degree of protection against post-natal depression," he said.