If you take prescription medication, you can be “fairly certain of what you’re getting” because of strict federal regulations that “mandate quality and consistency.”

But, as an article in Buzzfeed explains, that is not the case for another prescription — medical marijuana.

“As more states legalize medical or recreational marijuana, they’re tasked with defining the kind of tests and quality controls that must be done, if any, on the edibles, bud, and concentrates sold at dispensaries and storefronts across the country,” the article states. “But because selling or possessing cannabis is still a federal crime, the 23 states that have legalized medical marijuana aren’t getting any guidance from the EPA, FDA, or USDA, the federal agencies that set the standards for safely growing and processing plants for consumption.”

Buzzfeed identifies a couple of potential problems: “Bud can mildew or be covered in potentially dangerous pesticides; edibles can be contaminated with E. coli or mold; concentrates like butane hash oil can have high levels of solvents left over from processing.”

The news comes as Hawaii’s Department of Health last week posted interim administrative rules for the state’s brand-new medical marijuana dispensary licensing program.