| abstract |
A novel particulate composite hydrotalcite which offers antacidic effect comparable to that of a particulate hydrotalcite so far used as a gastric antacid and, further, offers excellent stomach inner wall protection effect. A particulate composite hydrotalcite represented by the following formula (1), n (Mg a Zn b ) 1-x Al x (OH) 2 (A n− ) x/n ·m H 2 O (1) n wherein A n− is CO 3 2− , SO 4 2− or Cl − , n is 1 or 2, and n x, a, b and m are values that satisfy the following conditions, n 0.18≦x≦0.4, 0.5≦a<1, 0<b≦0.5, 0≦m≦1, n and a gastric antacid using the particulate composite hydrotalcite as an effective component. When used as a gastric antacid, the particulate composite hydrotalcite suppresses the occurrence of damage in the mucous membranes of stomach and intestines. |