Because most municipal water is already fluoridated, it is usually not necessary to use fluoride supplements to strengthen your child's teeth. Most doctors recommend that children only get fluoridated toothpaste after the age of two years. A child can also get exposed to too much fluoride by swallowing toothpaste or mouthwash. Using too much toothpaste at a time is also a contributing factor. Children should make sure that they use the right amount of toothpaste and rinse properly after brushing.
As a parent, you should not try to avoid using fluoride toothpaste for your children's teeth, just because of the possible side effects. Fluoride does help prevent the formation of cavities, which are common in children, due to their tolerance for sweet, sugary food and drink.