Which major discovery helps to design drugs in the treatment of hyperacidity?

Correct option is C

Correct Answer: (C) Histamine stimulates acid secretion in the stomach

Explanation:

• The discovery that histamine stimulates acid secretion in the stomach was a breakthrough in understanding hyperacidity and paved the way for developing anti-histamine drugs used to treat conditions like gastric ulcers, GERD, and hyperacidity.
• Histamine acts on H₂ receptors in the stomach lining, promoting the secretion of hydrochloric acid (HCl).
• Drugs like cimetidine and ranitidine (H₂ receptor blockers) were developed based on this discovery.

Information Booster:

• H₂ receptor antagonists reduce stomach acid production by blocking histamine’s action on gastric parietal cells.
• Proton pump inhibitors (PPIs) like omeprazole also target acid secretion but act by inhibiting the proton pump, not histamine.
• The role of histamine in acid secretion was clarified in the 20th century, transforming gastrointestinal pharmacology.
• Sir James Black won the Nobel Prize in Physiology or Medicine (1988) for his work on H₂ receptor antagonists.

Additional Information (Why other options are incorrect):

• (A) The role of enzymes in digestion – Important for nutrient breakdown but not directly linked to hyperacidity treatment.
• (B) Use of antibiotics to neutralize acid – Antibiotics are used against H. pylori, not for acid neutralization.
• (D) Hydrochloric acid in the stomach – Its presence is known, but its regulation via histamine is the key therapeutic insight.