…study suggests A drug based on a com­pound in hallucinogenic mushrooms can improve the symp­toms of severe de­pression for up to 12 weeks, a trial shows. A 25mg tablet of psilocybin puts pa­tients in a dreamlike state, making psy­chological therapy more likely to suc­ceed.But the short-term side-effects could be frightening and support must al­ways be…