What are some medicines to avoid when breastfeeding?

As with any medicine be sure to check with your doctor before taking, even over the counter medicines.

Here is a partial list of some common and even over the counter medication and the reasons to avoid them

  • Antibacterials – While some are safe others may cause diarrhea, thrush, rash, bloody stools, or other problems
  • Antidepressants – drowsiness is the most common effect on your child. Especially avoid ones with phenelzine and tranylcypromine
  • Antifungals – the ingredient ketoconazole poses risk for liver damage
  • Antihistamines – may reduce your milk flow and cause drowsiness or fussiness in your child.  Be esopcially careful to avoid cetirizine
  • Anti-inflammatory – While ibuprofen is generally safe, many others are unsafe for children under one year
  • Aspirin – can cause Reyes syndrome and bleeding
  • Chemotherapy - very toxic to breastfeeding children, even in small amounts
  • Decongestants – oral decongestants can cause fussiness in your child.
  • Diuretics – can suppress your lactation
  • Heart and blood pressure medication – Most seem safe but ones with acebutolol, atenolol, nadolol, sotalol, or timolol may accumulate to toxic levels in your babies blood
  • Hormones – hormone contraceptives can interfere with lactation if taken in the first six weeks
  • Narcotics – if given during labor they may inhibit lactation.  Can cause drowsiness in nursing babies
  • Pepto-Bismol - Salicylates ingredients can be toxic to nursing babies
  • Tranquilizers – may make your child drowsy, avoid any with clozapine which can decrease white blood count.

This is by no means a comprehensive list of medicines to avoid while breastfeeding.  Be sure to talk to your doctor before taking anything while you are breastfeeding.