A study based on online Google searches suggests surging U.S. interest in microdosing psychedelics, such as psilocybin, as rules around the use of such drugs begin to relax. But the safety of these drugs isn't entirely clear, said study lead author Dr. Kevin Yang. "As public interest in using psychedelics and cannabis for health grows, it’s crucial that the medical community conducts studies to establish a strong evidence base for their safety and efficacy," said Yang, a psychiatry resident physician at the UC San Diego School of Medicine. According to a UC San Diego news release, people who microdose take "'sub-perceptual' doses of psychedelics, often over prolonged periods, with users claiming it improves cognition, mood and overall health without causing the intense hallucinogenic effects of higher doses."?