Both the U.S. Food and Drug Administration and most pediatricians strongly recommend that parents do not give teething tablets to their children. However, Hyland's, which manufactures widely available over-the-counter homeopathic teething tablets, claims that the tablets "are formulated for babies of all ages – starting with infants."
In 2010, the FDA issued a warning to consumers to stop using and discard Hyland’s Baby Teething Tablets. The tablets contain varying amounts of belladonna, a potentially toxic ingredient, which Hyland's adds to the tablets "to ease the redness, inflammation and discomfort of the child’s gum that often occurs during the teething process." As of 2013, the FDA continued to warn parents that the agency "has not evaluated Hyland’s Baby Teething Tablets for safety or efficacy, and is not aware of any proven clinical benefit offered by the product."
About.com indicates that pediatricians do not recommend parents giving their children teething tablets because viral infections, ear infections and sleeping problems are sometimes confused for teething symptoms. Dr. Wendy Sue Swanson, a pediatrician at Seattle Children's Hospital, Research and Foundation, recommends against teething tablets due to overall safety concerns and the lack of a known benefit.