Which medication neutralizes stomach acidity?

• A. Antacids
• B. Antiemetic
• C. H2-receptor blockers
• D. Proton Pump Inhibitors

Answer: (A)

The idea being tested is how a medicine directly neutralizes existing stomach acid. Antacids contain alkaline compounds that react with hydrochloric acid in the stomach to form water and salts, which raises the gastric pH quickly and provides rapid relief from acidity. They act directly on the acid present, usually within minutes and for a few hours.

The other options don’t neutralize acid. An antiemetic targets nausea or vomiting, not acidity. H2-receptor blockers decrease acid production by blocking histamine receptors on parietal cells, but they don’t neutralize the current acid and their effect develops over hours. Proton pump inhibitors block the proton pump to reduce acid secretion, with even slower onset and longer-term effect. So for direct neutralization of stomach acidity, antacids are the best choice.