Doctors in the US (and pharmacists for that matter) aren't trained AT ALL in herbs.
Licorice is fine during breastfeeding. Those "warnings" are CYA.
I've used licorice for long periods (1+ year) to help enhance ovulation,...
The 3 year was definitely the worst. he nursed like a newborn and worse!
It's not the same tiring-causing thing as a newborn though. Probably because there's not the whole having to do everything for them bit (they can walk, eat, etc).