Some of Missouri's biggest cities and counties have banded together to do what the state won't: track the prescription and sale of opioids.

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St. Louis County, the city of St. Louis and several other counties have their own prescription drug monitoring program set to go online next month.

Missouri is the only state without such a system, thanks largely to the efforts of a Republican state senator who has privacy concerns.

The CDC says such systems have been effective in other states.