An add from the late eighteen-hundreds --- see the bottom of the add it says not for children under 6 years of age. Watt kids used to smoke cigarettes back in that time. No wonder there was so many ghost towns. The doctors killed off all the patience.
My #1 tip for canker sores or mouth sores is to use L-Lysine(can be found at most natural food stores, vitamin shops & some drug stores) mix 1tsp in warm water, gargle and swallow. It's not the best taste in the world but it works wonders. Top 9 Home Remedies for Mouth Ulcers..