Abstract: A semiconductor device according to the present embodiment includes: a first electrode; a first semiconductor region of a first conductivity type disposed above the first electrode; a second semiconductor region of a second conductivity type disposed on the first semiconductor region; a third semiconductor region of the first conductivity type disposed on the second semiconductor region; a second electrode disposed in the first semiconductor region; a third electrode facing the second semiconductor region via a second insulating film; a fourth electrode having a portion adjacent to a part of the second semiconductor region and the third semiconductor region in the second direction, the second semiconductor region, and the third semiconductor region; and a fifth electrode disposed in the first insulating film, having a bottom located closer to the first electrode than a bottom of the portion, having a top located on an upper surface of the first insulating film.

Abstract: Disclosed is a therapeutic agent for primary biliary cirrhosis, which contains L-alanine or a pharmaceutically acceptable salt thereof as the active ingredient. The effect of this therapeutic agent is to reduce serum total bilirubin and transaminase value, thereby effectively curing primary biliary cirrhosis. This therapeutic agent can be chronically administrated for a long period of time and exhibits an effect superior to that obtained in ordinary medical therapy.