Abstract: The invention relates to the pharmaceutical composition for the treatment of a brain tumor, which contains in an effective amount from pharmaceutical point of view Peptidtoxin from spiders, Sicarius species and/or the saliva of the vipers from the Elaphe species; and the total poison or part of the spiders poison from the Latrodectus species, as well as the use of the pharmaceutical composition for the treatment of the brain tumor, a process for producing the pharmaceutical composition as well as a kit of parts containing the pharmaceutical composition.