Office United States of America Application Number 17156233 Application Date 22.01.2021 Publication Number 20210267977 Publication Date 02.09.2021 Publication Kind A1 IPC A61K 31/517 A61K 31/48 A61P 25/26 CPC A61P 25/26 A61K 31/517 A61K 31/48 Applicants Universitätsspital Basel Inventors Matthias Emanuel LIECHTI Title (EN) CONTROLLING EFFECTS AFTER 5HT2A AGONISTS ADMINISTRATION front page image Abstract (EN) A composition for treating an individual while reducing acute effects, including effective amounts of a psychedelic drug and a duration shortening agent. A method of treating an individual with a psychedelic drug and reducing its acute duration of action, by administering a psychedelic drug to the individual, administering a duration shortening agent to the individual, and shortening and/or reducing the acute effects of the psychedelic drug. A method of stopping the acute duration of action of a psychedelic drug in an individual, by administering a duration shortening agent to the individual after the individual has taken a psychedelic drug and stopping the acute effects of the psychedelic drug.