evidence: Last year, more than 70,000 Americans died from a fentanyl overdose, according to the Centers for Disease Control and Prevention. That's a higher death toll than U.S. military casualties in the wars in Vietnam, Iraq, and Afghanistan combined. [...] The CDC says other signs of a fentanyl overdose are an inability to awaken the person; constricted "pinpoint" pupils that don't react to light; shallow breathing or difficulty breathing, such as choking sounds, gurgling, or snoring from someone who cannot be awakened; and discolored skin, especially in the nails or lips. Dr. Campman added that a rare subset of fentanyl overdose victims die a more rapid death due to "wooden chest syndrome," where they suddenly can't breathe.