In a preferred embodiment, there is provided a method for preparing a medicament for the treatment or prevention of a cancer, the method comprising: grinding a Piper plant or a plant component thereof to obtain a ground plant mixture or powder soaking the ground plant mixture or powder in a solvent to obtain a suspension having a liquid extract portion and a plant solid portion and separating the liquid extract portion from the plant solid portion to provide a separated liquid extract for use in the medicament.
