Lack of stools / constipation in a breastfed baby https://breastfeeding-and-medication.co.uk/fact-sheet/lack-of-stools-constipation-in-a-breastfed-baby
The Breastfeeding Network Independent source of breastfeeding support and Drugs in Breastmilk Helpline https://www.breastfeedingnetwork.org.uk/drugs-factsheets/
Drugs and Lactation Database (LactMed) – A peer-reviewed and fully referenced database of drugs to which breastfeeding mothers may be exposed. https://www.ncbi.nlm.nih.gov/books/NBK501922/
Drugs in Breastmilk West Midlands Regional Medicines Information Services guide is based on information compiled by the Trent and West Midlands Medicines Information Services. https://www.sps.nhs.uk/home/guidance/safety-in-breastfeeding/
Medication and Mothers Milk Thomas W. Hale, R.Ph. Ph.D. available as a book undated regularly or online access (subscription) https://www.halesmeds.com/
Breastfeeding and Maternal Medication (PDF file) World Health Organization, 2002
https://www.who.int/publications/i/item/55732
Drugs in Pregnancy Motherisk’s published studies on the safety or risk of specific drugs during pregnancy www,motherisk.org
Gerald G. Briggs, and RK Freeman Drugs in Pregnancy and Lactation available as hardback from Amazon
American Academy of Pediatrics Publication on The Transfer of Drugs into Human Milk https://pediatrics.aappublications.org/content/pediatrics/108/3/776.full.pdf
KellyMom Breastfeeding and parenting website with information on mediication and breastfeeding https://kellymom.com/
Breastfeeding Online More links to information on medication and breastfeeding and to Dr Jack Newman. https://ibconline.ca/
The Green Book A Department of Health Publication on immunisation to download https://www.gov.uk/government/collections/immunisation-against-infectious-disease-the-green-book
UKAMB United Kingdom Association for Milk Banking
NICE Guidlines on Maternal and Child Nutrition https://www.nice.org.uk/guidance/ph11