The agency warned that adults and children who inadvertently took a higher dose of clonazepam than prescribed could experience side effects, including “significant” sedation, confusion, dizziness, diminished reflexes, the loss of muscle control and muscle weakness.

Additional packages of clonazepam, a prescription medication used to treat seizures and anxiety, mislabeled with the incorrect strength have been added to a voluntary recall, according to the U.S. Food and Drug Administration.

Clonazepam, an anxiety drug, has been recalled because of a labeling error that could result in harmful consequences.