Now sadly I know from experience that the ones you take in tablet form are a no no when Breastfeeding as they damage milk supply, but I have an awful cold and literally can get no air through my nose! I can't even eat and breathe at the same time 
Does anyone know which ingredient is the one that is bad and can I still you a nasal decongestant?
I would ask in the pharmacy but last time they literally had no idea (along with a Dr I asked on a separate occasion) and their default is always 'don't take it if you are bf' which is not helpful!