Both antacids and antiallergic drugs are antihistamines, but they cannot replace each other. Explain why?
Both antacids and antiallergic drugs are categorized under antihistamines due to their working pathway, but they cannot be replaced. Since antacids are responsible for neutralizes excess acid present in the stomach, antiallergic drugs act to prevent the action of histamine produced in the body in case of an allergic reaction. Having different body receptors and purpose, they cannot be replaced.