What is the onset time for oral glucose action?

• A. 10 minutes
• B. 15 minutes
• C. 5 minutes
• D. 30 minutes

Answer: (A)

The main idea being tested is how quickly oral glucose starts working after you swallow it. When glucose is taken by mouth, it is absorbed through the small intestine and enters the bloodstream, lifting blood sugar in a relatively short time. In practice, this rapid absorption typically leads to a noticeable rise in blood glucose about 10 minutes after ingestion, which is why this onset is described as around ten minutes. This quick action is why oral glucose is used for conscious patients with suspected hypoglycemia and who can safely swallow.

Some variability exists because gastric emptying and the presence of food in the stomach can affect speed, but 10 minutes is the most consistent and commonly cited timeframe in acute care. A 5-minute onset would be unusually fast for swallowed glucose, while 15 minutes is plausible but less typical, and 30 minutes would be too slow for urgent reversal of hypoglycemia.