A medication is prescribed to be given QID. Which set of times represents a QID dosing schedule?

A medication is prescribed to be given QID. Which set of times represents a QID dosing schedule?

• A. 0800, 1200, 1600, 2000
• B. 0900, 1300, 1700, 2100
• C. 0700, 1100, 1500, 1900
• D. 1200, 1600, 2000, 2400

Answer: (A)

Four times in a 24-hour period means spacing doses so levels stay relatively steady. A common and practical way to do this is to administer four doses evenly through the day, such as 08:00, 12:00, 16:00, and 20:00. This pattern keeps doses roughly every four hours during waking hours, providing daytime coverage and avoiding a dose in the middle of the night. Other options would place a dose at inconvenient or nighttime times or break the regular four-times-a-day rhythm, making them less consistent with the QID idea.

Four times in a 24-hour period means spacing doses so levels stay relatively steady. A common and practical way to do this is to administer four doses evenly through the day, such as 08:00, 12:00, 16:00, and 20:00. This pattern keeps doses roughly every four hours during waking hours, providing daytime coverage and avoiding a dose in the middle of the night. Other options would place a dose at inconvenient or nighttime times or break the regular four-times-a-day rhythm, making them less consistent with the QID idea.