Which instruction is correct regarding alendronate administration to prevent esophagitis?

• A. Take the medication and sit upright for 30 minutes after taking.
• B. Take it just before bedtime.
• C. Take it with an antacid.
• D. Take it with a large meal.

Answer: (A)

Alendronate can irritate the esophagus if it stays there after swallowing, so the goal is to move it into the stomach quickly and keep the esophagus from being exposed. The best way to do this is to take the medication with a full glass of water and remain upright for at least 30 minutes. This upright position helps gravity carry the pill down and prevents reflux or contact with the esophageal lining. Bedtime dosing is avoided because lying down soon after taking it increases esophageal exposure and risk of irritation. Taking it with antacids or a large meal can interfere with absorption and doesn’t provide the same esophageal protection, and it can delay transit. So the instruction to take it and sit upright for 30 minutes after taking is the correct approach to prevent esophagitis.