A gastric ulcer patient requires close follow-up to document complete ulcer healing because

Correct Answer: C

Rationale: Gastric ulcers may be malignant, requiring follow-up to rule out cancer. Perforation is less common, and spontaneous healing isn't the primary concern.

Correct Answer: D

Rationale: Histamine stimulation of the H₂ receptor directly activates parietal cells to secrete gastric acid, playing a key role in acid production.

Correct Answer: C

Rationale: Cimetidine can cause mental confusion in the elderly due to its ability to penetrate the blood-brain barrier, a notable adverse effect.

Correct Answer: A

Rationale: PPIs can mask gastric cancer symptoms, delaying diagnosis, which is a critical concern in their long-term use.

Correct Answer: D

Rationale: Cyclizine, an antihistamine, causes dry mouth due to its anticholinergic properties, a common side effect.