The U.S. Drug Enforcement Administration announced on Thursday that it had found no evidence that marijuana has caused or contributed to the deaths of anyone.
The DEA is the first agency to publicly say that marijuana is safe, even if some studies suggest that it may be harmful.
“There are no known links between marijuana use and the onset of dementia, Alzheimer’s, Parkinson’s, multiple sclerosis, or chronic pain,” the agency said in a statement.
Marijuana is legal in some states but not in others.
It is still illegal in the U.K. and France.
The U, S. Supreme Court issued a ruling on the matter last month and upheld a federal ban on marijuana use, but the decision is not binding in the states where it has been legal for recreational use.
The decision to ban marijuana from the U,S.
has drawn criticism from many in the medical marijuana community.
“We believe the evidence is not compelling to support a conclusion that marijuana use is associated with the development of a fatal brain disease,” said Dr. Michael Moskowitz, a professor of neurology at Johns Hopkins University School of Medicine and co-author of the DEA statement.
Moskwitz said the scientific evidence is still weak and that there are no studies that support a causal link between marijuana and Alzheimer’s or other neurological disorders.
Mos, a psychiatrist and coauthor of a new book on the topic, has argued that a link between medical marijuana use in the United States and deaths is highly unlikely.
But he said that if there is a causal relationship between marijuana usage and the death of someone, then “you can’t rule it out.”