Using tolerance intervals for assessment of pharmaceutical quality
Related Experiment Video
Updated: Apr 21, 2026

Author Spotlight: Microbial Control and Monitoring Strategies for Cleanroom Environments and Cellular Therapies
Published on: March 17, 2023
Xiaoyu Dong1, Yi Tsong, Meiyu Shen
1a Office of Biostatistics , /Office of Translational Sciences, Center for Drug Evaluation and Research, U.S. Food and Drug Administration, Silver Spring , Maryland , USA.
Abstract:
In quality control of drug products, tolerance intervals are commonly used methods to assure a certain proportion of the products covered within a pre-specified acceptance interval. Depending on the nature of the quality attributes, the corresponding acceptance interval could be one-sided or two-sided. Thus, the tolerance intervals can also be one-sided or two-sided. To better utilize tolerance intervals for quality assurance, we reviewed the computation method and studied their statistical properties in terms of batch acceptance probability in this article. We also illustrate the application of one-sided and two-sided tolerance, as well as two one-sided tests through the examples of dose content uniformity test, delivered dose uniformity test, and dissolution test.
Related Concept Videos
Drug Dissolution: Requirements and Profile Comparison
Clinically Relevant Drug Product Specifications: Methods of Establishment
Dosage Regimen: Individualization
Pharmaceutical Alternatives: Stability-Related Therapeutic Nonequivalence
Drug Product Stability
Dosage Interval and Administration Route: Determination Methods

