Kim Loos Dr. Kimberly A. Loos practices general dentistry in San Jose, California. She is also a clinical instructor at University of Pacific School of Dentistry and an editor for Dentistry On-Line. First and foremost, I wish to stress that fluoride is safe and effective when it is taken as directed.
Small children do tend to swallow fluoride toothpaste.
This is why I recommend that only a match head size amount of fluoride toothpaste should be placed on their toothbrush. This will ensure that they receive the safe, effective cavity fighting protection they need without ill effects. Most drugs can be harmful or even deadly if they are not taken as directed. Yes, fluoride can be toxic if it is ingested in very large quantities. The medical and dental professions, as well as the US Food and Drug Administration, recognize the potential harmful effects when very large amounts of fluoride are swallowed.