Trump’s major cannabis law change in the US explained amid warning on horrifying new side effect

Donald Trump has signaled that he may support changing U.S. cannabis laws after researchers identified a previously undocumented side effect linked to long-term use. Cannabis legality in the U.S. varies widely, with each state setting its own rules and drawing distinctions between medical and recreational use.

The drug is commonly prescribed for issues like chronic pain, muscle spasms in Multiple Sclerosis, and easing chemotherapy symptoms. For these medical purposes, it is often considered a safer option than opioids. Recreational use, however, is treated much differently from state to state, and federal law still classifies cannabis as illegal.

At a press conference earlier this year, Trump indicated that his administration may reconsider how cannabis is categorized. He said they were examining the issue and expected to make a decision within weeks.

In an unexpectedly cautious remark, Trump admitted the issue is not straightforward. He noted hearing positive feedback about medical cannabis but mostly negative reports about broader use.

Cannabis remains a Schedule I substance under federal law, though many states have introduced exemptions for medical treatment. Others—such as California—permit limited recreational possession.

Trump’s comments resurfaced after scientists identified a new condition affecting some long-term cannabis users: cannabis hyperemesis syndrome (CHS). This disorder can cause severe nausea and vomiting.

Dr. Chris Buresh, an emergency medicine expert, explained that some people appear to hit a personal threshold where cannabis suddenly triggers illness. He added that even small amounts can provoke symptoms in those vulnerable to CHS.