Antacids, Antihistamines — Predicted 2026

AI-Predicted Question Angles for UPSC 2026

Based on trend analysis, current affairs, and recurring themes in Antacids, Antihistamines.

Mechanism of action differentiation

high

NEET frequently tests the core mechanism of drug action. A question might ask to differentiate between how antacids, H2-receptor antagonists, and potentially proton pump inhibitors (from related topics) reduce stomach acidity. This requires a clear understanding of direct neutralization versus receptor blockade versus enzyme inhibition. For example, 'Identify the drug class that directly neutralizes gastric acid without affecting its production.'

Classification and specific examples with properties

high

Students are expected to know specific drug names and their classification, along with a key property. A common question type is matching drug names to their generation (for antihistamines) or their primary side effect. For instance, 'Match the following antihistamines with their characteristic property: (A) Diphenhydramine - non-sedating, (B) Loratadine - sedating, (C) Ranitidine - H1 blocker, (D) Cetirizine - non-sedating.' (Here D would be correct, and others incorrect).

Chemical reactions and byproducts of antacids

medium

While not as frequent as mechanism or classification, questions on the chemical reactions of antacids, especially those producing gas, can appear. This tests basic inorganic chemistry knowledge applied to medicine. For example, 'Which antacid component produces a gaseous byproduct upon reaction with HCl in the stomach?' This requires recalling the specific reactions of carbonates/bicarbonates versus hydroxides.