The antipsychotic drug fluphenazine has a prolonged period of action when it is given by intramuscular injection, but not when it is given by intravenous injection.Suggest why this is the case.
精神抑制药氟奋乃定,采用肌肉注射的话有
段延迟的反应期,但是采用静脉注射却没有,说明为
么
出现这种情况。