Complex sentence: Weise's murders reopened the debate about Prozac use among children and adolescents; in October 2004, the Food and Drug Administration (FDA) had issued a warning about its use; it is the only anti-depressant approved for use with children.
Split into simpler sentences: Weise's murders reopened the debate about Prozac use among children and adolescents. In October 2004, the Food and Drug Administration (FDA) had issued a warning about its use; but it is the only anti-depressant approved for use with children.