July 30 (Reuters) – Military veterans with post-traumatic stress disorder who got no relief from conventional treatments went into remission following treatment with the psychedelic drug psilocybin in a small U.S. pilot study, researchers say. In April, President Donald Trump signed an executive order directing health regulators to speed reviews of psychedelic treatments and increase federal funding for research into their use. Advertisement Advertisement"For a population with severe treatment-resistant PTSD, these results are striking," study coauthor Stacey Armstrong, also of Ohio State University, said in a statement. The 11-week trial period combined eight hours of psychotherapy followed by two doses of synthetic psilocybin given two to three weeks apart. Liquid showing promiseThe PTSD researchers say they hope to secure funding to follow up with a larger randomized, controlled clinical trial.