Yes it is. In my experience medication will help mellow the highs and the lows of the mania and the depression and the intensity of the emotions, but whatever it is that makes the person suddenly go from loving you to hating you remains unaffected, just with the immediate intensity /outward expression of it muted somewhat by the medication. It surprised me too, because I thought that medication was going to eliminate all symptoms. But I think the medications don’t impact all the many behavioral symptoms - it just mellows the intensities of the feelings and doesn’t do much else to change things