Interpret the prescription notation 2 gtt AU BID. Which of the following is correct?

Interpret the prescription notation 2 gtt AU BID. Which of the following is correct?

• A. Two drops in left ear twice daily
• B. Two drops in both ears twice daily
• C. Two drops in both ears once daily
• D. Two drops in right ear twice daily

Answer: (B)

Understanding dosage abbreviations helps decode prescription notation quickly. Here, gtt means drops, AU (or OU) means both ears, and BID means twice a day. So this instruction directs you to administer two drops into each ear, every 12 hours (twice daily). In other words, two drops per ear at each dosing time, not just in one ear or only once a day.

Understanding dosage abbreviations helps decode prescription notation quickly. Here, gtt means drops, AU (or OU) means both ears, and BID means twice a day. So this instruction directs you to administer two drops into each ear, every 12 hours (twice daily). In other words, two drops per ear at each dosing time, not just in one ear or only once a day.