ROCKFORD, Ill. (WTVO) — Opioid use continues to be a national concern as “rainbow fentanyl” is making headlines.

Rockford’s Rosecrance Health Network is warning of the drug’s dangers, as just a trace of it can be fatal. Dr. Tom Wright, chief of clinical excellence and president of medical affairs at Rosecrance, said that fentanyl can be mixed with other drugs or mistaken for a prescription.

He also said, “while the latest marketing trend is worrisome, fentanyl is so potent that it is not likely being marketed toward adolescents.”