Painstop was given to our bub at 6 months old after the pain relief from major surgery had worn off and we were given a script to fill which we did and take home to use for the next 24 hours. This was from the Melb Royal Childrens Hospital. It is safe for bubs to have but there would be quite strict guidelines for reasons to use it and teething wouldn't be one of them. Does she have a script for it? You couldn't buy it over the counter when we used it.