KANSAS CITY, Mo. — The Missouri Department of Health and Senior Services (DHSS) released a warning about an unregulated drug that mimics the effects of opioids.

7-OH, short for 7-hydroxymitragynine, comes from kratom, a tropical tree. It's a psychoactive compound that has similar effects in the brain as opioids.

Kratom and its derivatives like 7-OH are unregulated by the FDA, but the agency has repeatedly said it's working to classify it as a Schedule 1 drug.

Earlier this month, FOX4 spoke with a woman who went to drug rehab after she began using 7-OH.

"As soon as I took that 7-OH, it was like taking heroin again for the first time," 25-year-old Madison Mcmanness told FOX4. "It was really hard lying in the detox for three days, just catatonic. Everything was on fire. It hurt. I just di

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