Californians were warned Nov. 22 not to eat PolkaDot brand Mushroom Magic Blend chocolate bars over concerns that the chocolate contains psychoactive drugs.
Laboratory testing determined that the bars contained an additional synthetic psychoactive drug, according to the state.
More than $3 million worth of the candy was embargoed and voluntarily destroyed, the state reported.
"The responsible firms may be subject to further enforcement action including civil or criminal penalties pending additional investigation by the state's health department and the San Diego County Sheriff's Department, according to the statement.
The adulterated chocolate bars were 2.1 ounces each and produced in multiple flavors, including Belgian milk chocolate caramel peanut twist, Belgian milk chocolate intense dark, and Belgian milk chocolate Maui coconut twist.
"The California Department of Public Health appreciates the joint investigative work conducted with the San Diego County sheriff's office," said state Public Health Officer Thomas Aragon. "Partnerships like this play a big role in the [department's] efforts to protect the public from foods that may be unsafe."
Representatives from the company did not return requests for comment Friday.
Anyone experiencing any ill effects after eating the chocolate bars should consult with their health care providers, according to the state.
Possessing magic mushrooms and psychedelic mushrooms is illegal in California. Possessing small amounts for personal use may lead to misdemeanor fines and jail time.
In his veto message, the governor said medical research has demonstrated that treatment with such hallucinogens can help "relieve people suffering from certain conditions, such as depression, PTSD, traumatic brain injury, and other addictive personality traits," but that regulations and guidelines should come before legalization.