Dear Liquorice,

If you are not certain about the drugs you are taking please check with a lactation consultant or a La Leche League Leader (

The drugs paracetamol, dextromethorphan and promathezine are all fine to take while breastfeeding. Paracetamol and dextromethorphan have a lactation risk of L1 and promathezine of L2. The catagories are L1 = safest, L2 = safer,
L3 moderately safe, L4 = possibly hazardous and L5 = contraindicated. I only know of 16 drugs that are in the L5 catagory. Most drugs are fine while breastfeeding, especially if you would give a sick baby the same drug.

While there is a theoretical possibility that a decongestant could affect your milk supply I wouldn't worry too much about this unless you are already worried about the amount of milk you have.

Best wishes,

Sarah Hung IBCLC