Extended-release formulations, such as XR, are designed to do which of the following?

Extended-release formulations, such as XR, are designed to do which of the following?

• A. Provide rapid peak levels
• B. Increase the need for dosing frequency
• C. Decrease overall bioavailability
• D. Release drug evenly over time for a stable level

Answer: (D)

Extended-release formulations are designed to release the drug gradually over time, creating a more stable and sustained plasma concentration. This approach smooths out fluctuations, maintains therapeutic levels for a longer period, and often allows less frequent dosing. Releasing the drug evenly over time for a stable level captures this goal best. Rapid peak levels happen with immediate-release products, not XR. Increasing dosing frequency would negate the benefit of extending release, and decreasing overall bioavailability is not the aim, since the goal is to preserve total exposure while spreading it out.

Extended-release formulations are designed to release the drug gradually over time, creating a more stable and sustained plasma concentration. This approach smooths out fluctuations, maintains therapeutic levels for a longer period, and often allows less frequent dosing. Releasing the drug evenly over time for a stable level captures this goal best. Rapid peak levels happen with immediate-release products, not XR. Increasing dosing frequency would negate the benefit of extending release, and decreasing overall bioavailability is not the aim, since the goal is to preserve total exposure while spreading it out.