One or two doses of psilocybin, a compound found in psychedelic mushrooms, may improve the mental health of cancer patients when accompanied by psychotherapy, a new report suggests. A second new study found that treatment with psilocybin resulted in lasting, positive personality changes in patients with alcohol use disorder. The first report’s findings were published online Oct. 7 in the journal Nature Mental Health, and the second published online Jan. 1 in a special edition of The American Journal of Psychiatry focused on psilocybin...