Researchers from Johns Hopkins University have recommended that psilocybin, the active compound in hallucinogenic mushrooms, be reclassified for medical use, potentially paving the way for the psychedelic drug to one day treat depression and anxiety. The suggestion to reclassify psilocybin from a Schedule I drug, with no known medical benefit, to a Schedule IV drug, which is akin to prescription sleeping pills, was part of a review to assess the safety and abuse of medically administered psilocybin. Before the Food and Drug Administration can be petitioned to reclassify the drug, though, it has to clear extensive study and trials, which can take more than five years, the researchers wrote. The study comes as many Americans shift their attitudes toward the use of some illegal drugs. The widespread legalization of marijuana has helped demystify drug use, with many people now recognizing the medicinal benefits for those with anxiety, arthritis and other physical ailments. Psychedelics, like LSD and psilocybin, are illegal and not approved for medical or recreational use. But in recent years scientists and consumers have begun rethinking their use to combat depression and anxiety. Researchers who conducted the new study included Roland R. Griffiths, a professor ... at the Johns Hopkins University School of Medicine, who is one of the most prominent researchers on the behavioral and subjective effects of mood-altering drugs.