The FDA has issued a recall for all types and lot numbers of Hyland’s Teething Tablets. Some of these tablets have been found to contain belladonna. Belladonna is a plant (also known as Deadly Nightshade) that has been used for centuries as a medicine and a poison. In large quantities it can have harmful effects in children, such as a racing heartbeat, dry mouth and skin, drowsiness, and dilated pupils. The FDA has received reports of children exhibiting signs of belladonna toxicity after taking the tablets.
If you have any of these teething tablets, stop using them and return them to the store.
More information here.