1 Antidepressants can Cause Suicidal Thoughts and/or Behavior in Children. 2  What to do if Your Child is Anxious or Depressed. 3  Antidepressants Approved for Children. 4  Getting Your Child Started on Antidepressants. 5  Signs of Suicidal Thoughts in Children. 6  The Bottom Line on Kids and Antidepressants.