The present invention provides crystalline forms of the chloride monohydrochloride salt of fosnetupitant, methods of making the crystalline forms, and pharmaceutical dosage forms that make use of the crystalline forms.本發明提供福奈孚匹坦的氯化物單鹽酸鹽之結晶形式、製備該結晶形式的方法、及利用該結晶形式的醫藥劑型。