Answer
Mg(OH)$_{2}$ is a base, which would counteract the action of the hydrochloric acid in the stomach. Acids and bases react with one another to produce a less acidic product.
Work Step by Step
Mg(OH)$_{2}$ is a base, which would counteract the action of the hydrochloric acid in the stomach. Acids and bases react with one another to produce a less acidic product.