Tag: GMP compliance

Use Differential Scanning Calorimetry (DSC) to Assess Solid-State Transitions

Understanding the Tip: Why solid-state transitions matter in pharmaceutical stability: APIs and excipients in solid dosage forms can exist in multiple physical forms, such as crystalline polymorphs, hydrates, or amorphous states. These forms affect solubility, dissolution, stability, and bioavailability. Over time, environmental factors like temperature and humidity can induce transitions between forms—compromising product quality. Differential…

Stability Study Tips

Store Photostability Samples in Dark Amber Containers

Understanding the Tip: The role of amber containers in photostability: Photostability studies are designed to evaluate how exposure to light affects the chemical and physical stability of pharmaceutical products. However, samples not intended for direct light exposure—such as dark controls—must be completely shielded from stray light throughout the study. Using dark amber containers ensures that…

Stability Study Tips

Integrate Auto-Notifications in Your LIMS for Stability Pull Schedules

Understanding the Tip: The importance of timely stability sample pulls: Stability studies rely on consistent and accurate timing to evaluate product behavior over its intended shelf life. Each time-point pull—from initial (0M) to long-term (12M, 24M, etc.)—must occur precisely as scheduled to ensure valid trend analysis and regulatory acceptance. Manual tracking using Excel sheets or…

Stability Study Tips

Include Intact vs. Broken Blister Comparisons in Photostability Testing

Understanding the Tip: Why blister integrity matters in photostability studies: Blister packaging plays a critical role in protecting pharmaceutical tablets and capsules from environmental factors—especially light. Over time, blisters may become punctured, cracked, or compromised during distribution and handling. Photostability testing that only evaluates intact blisters may underestimate the risk of product degradation if exposed…

Stability Study Tips

Account for Residual Moisture Content in Lyophilized Products

Understanding the Tip: Why residual moisture impacts lyophilized product stability: Lyophilized (freeze-dried) products are designed to extend the shelf life of moisture-sensitive compounds, particularly peptides, biologics, and vaccines. However, the success of lyophilization depends on the ability to minimize and control residual moisture. Even small amounts of water left in the cake can catalyze hydrolysis,…

Stability Study Tips

For Inhalation Products, Include Aerosol Performance Testing in Stability

Understanding the Tip: Why aerosol performance must be part of stability testing: Inhalation products such as pressurized metered-dose inhalers (pMDIs), dry powder inhalers (DPIs), and nebulizer solutions are highly dependent on device functionality and aerosol characteristics. The therapeutic effect is governed by the accurate delivery of a defined particle size to the lungs. Over time,…

Stability Study Tips

Never Delete Original Data — Follow ALCOA+ Principles in Stability Studies

Understanding the Tip: Why original data must be preserved in stability studies: In the context of GMP-compliant stability testing, original data serves as the foundational evidence of product quality, regulatory compliance, and scientific integrity. Deleting, overwriting, or modifying raw data compromises traceability and may be construed as data falsification. Whether the data is paper-based or…

Stability Study Tips

Prepare Bridging Protocols if Manufacturing Site Changes During Stability

Understanding the Tip: Why site changes impact stability programs: Changing a manufacturing site mid-way through a stability program can introduce variability in material attributes, processing conditions, packaging operations, and environmental factors. Even if specifications remain constant, slight shifts in excipients, equipment, or personnel can affect the stability profile. Bridging protocols serve as a scientific roadmap…

Stability Study Tips

Don’t Store Different Product Classes in the Same Stability Chamber

Understanding the Tip: Why product segregation in stability chambers is critical: Stability chambers are controlled environments designed to simulate specific storage conditions over time. However, placing multiple product classes—such as tablets, injectables, creams, and biologics—within the same chamber increases the risk of volatile migration, odor transfer, and even moisture interaction. These hidden variables can distort…

Stability Study Tips

Ensure Availability of Reference Standards Across the Full Study Period

Understanding the Tip: Why uninterrupted access to reference standards is critical: Stability studies often span multiple years, and consistency in analytical testing is essential. Reference standards—whether primary (e.g., compendial) or secondary (working standards)—form the foundation of accuracy and precision in assay, impurity, and identification testing. Using different lots of standards without bridging studies or requalification…

Stability Study Tips