Medical cannabis and synthetic marijuana extracts should not be used to treat obstructive sleep apnea, experts have warned.

Derived from the Greek word meaning “without breath,” obstructive sleep apnea is a chronic illness that affects almost 30 million adults in the U.S. In those with the condition, the upper airways can shut hundreds of times a night, causing the person to unwittingly stop breathing for up to a minute. Obstructive is the most common form of sleep apnea, the others being central and mixed.

The American Academy of Sleep Medicine stated its position on treating sleep apnea with cannabis products on Sunday in the Journal of Clinical Sleep Medicine. Experts cited a lack of evidence that the treatment was effective, tolerable or safe. They also flagged concerns about the ways such products, which can be vaped or consumed in a liquid formula, were administered.

The statement came after the Minnesota Department of Health added obstructive sleep apnea to a list of conditions eligible for the state’s medical cannabis program in November 2017. [Read more @ Newsweek]