LSD reduced symptoms of anxiety in a midstage study published Thursday, paving the way for additional testing and possible medical approval of a psychedelic drug that has been banned in the U.S. for more than a half century.

The results from drugmaker Mindmed tested several doses of LSD in patients with moderate-to-severe generalized anxiety disorder, with the benefits lasting as long as three months. The company plans to conduct follow-up studies to confirm the results and then apply for Food and Drug Administration approval. Advertisement

Beginning in the 1950s, researchers published a flurry of papers exploring LSD's therapeutic uses, though most of them don't meet modern standards.

"I see this paper as a clear step in the direction of reviving that old research, applying our modern

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