Complex sentence: By suppressing acid-mediated breakdown of proteins, antacid preparations such as ranitidine may lead to an elevated risk of developing food or drug allergies, due to undigested proteins then passing into the gastrointestinal tract, where sensitisation occurs.
Split into simpler sentences: By suppressing acid-mediated break down of proteins, antacid preparations such as ranitidine may lead to an elevated risk of developing food or drug allergies. This happens due to undigested proteins then passing into the gastrointestinal tract where sensitisation occurs.