Something along the lines of Scarlett Johansson was in Lost in translation , set in Tokyo , Japan . Now Scarlett Johansson is cast as the major in Ghost in the Shell , set in a futuristic Tokyo , Japan . Coincidence ? I ' m positive they were being humorous . <| sep |> Psychosis varies . Cannabis can exacerbate already existing symptomsconditions . It cannot on its own cause a mental illness , but it can produce symptoms of one , which is very often confused with an actual Psychosis . The person may show symptoms but is still completely normal . On the contrary , it can also reduce real symptoms and even treat Psychosis , if properly dosed . Too high of a dose could make it worse . You would need to learn your condition and find the strain with the best suited chemical profile for your needs . Some people need more CBD than THC , some need solely terpenes like apinene . Ect ect . There ' s a wealth of different cannabinoids and terpenes that work well with each other . We ' re still finding new , better , more effective combinations of these . Edit woops hit comment by accident . So in short , it can make a current psychosis worse , or outright treat it and cure you . Is this answer satisfactory or would you like more info ? Edited edited again because auto correct is the embodiment of flaws . Fuck auto correct .