Drugs
Alcohol drinking solutions were prepared from 96% ethanol (Merck, Darmstadt, Germany) and then diluted with tap water. Psilocybin (3-[2-(dimethylamino) ethyl]−1H-indol-4-yl] dihydrogen phosphate: University of Chemistry and Technology Prague, Prague, Czech Republic) was dissolved in Ampuwa (aqua ad iniectabilia, Braun, Melsungen AG).