This happens due to undigested proteins passing into the gastrointestinal tract.

This leads to an elevated risk of developing food and drug allergies due to undigested proteins passing into the gastrointestinal tract where sensitisation occurs.

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.

These undigested proteins then pass into the gastrointestinal tract, potentially leading to sensitization to a range of foods or drugs.