RALEIGH -- A new warning from the North Carolina Department of Health and Human Services around vaping, specifically if you're using cannabidiol or CBD oil. 

DHHS says they're seeing an increase in patients going to the emergency room for serious symptoms like hallucinations, seizures, altered mental status, rapid heartbeat, and loss of consciousness; which aren't common for the oil.

State Health Director Betsey Tilson, M.D says the number has doubled from what they've seen in the past.

She explains, "CBD oil is supposed to be less than 0.3 percent of THC and therefore not having the psychoactive effects. It is technically illegal from a federal standpoint, and in North Carolina in general it is not legal, but it's not really enforced."

Since December, there's been more than 30 reported cases both DHHS and Carolina Poison Center have been investigating.

That number doesn't include military bases like Fort Bragg and Camp Lejeune, which are also seeing an uptick says Tilson.

"So there's a lot of CBD oils under a lot of different name brands and marketing. We're also seeing this across the state so it's not just one geographic concentration that we can highlight, it's forcing it across the state so it's really hard. We have not figured out if it's one specific brand, if it's one specific contaminant."

Another problem DHHS faces is that CBD isn't regulated.

"There's really no way to guarantee what's in there, with an unregulated compound, so it always comes with risks," says Tilson.

DHHS says anyone who experiences severe symptoms should seek medical attention.