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OKLAHOMA CITY (KFOR) – The Oklahoma Medical Marijuana Authority is warning patients about a potentially dangerous combination of chemicals.

The OMMA says its QA Lab Metis, found the presence of THC-O-acetate in a concentrate by the name of Platinum OG.

Officials say THC-O-acetate is not a medical marijuana product and has been shown to be very harmful when added to other THC-containing products.

The agency says the combination could lead to side effects like seizures, difficulty speaking, and vomiting.

If you have had negative health impacts after using a medical marijuana product purchased from a licensed dispensary, call the Oklahoma Center for Poison and Drug Control at 800-222-1222.