similia similibus curantur

Latin phrase

si·​mi·​lia si·​mi·​li·​bus cu·​ran·​tur si-ˈmi-lē-ä-si-ˈmi-li-bu̇s-kü-ˈrän-ˌtu̇r 

: like is cured by like : a disease may be cured by something that can cause similar symptoms