ICH Stability Testing Guidelines (Q1) explain stability study design climatic zones storage conditions and shelf life evaluation.
ICH Stability Testing Guidelines (Q1)
- Stability testing ensures that a pharmaceutical product maintains its identity, strength, quality, and purity over time under various environmental conditions.
- The ICH Q1 guidelines provide a framework for conducting these tests.
Key Stability Guidelines:
| ICH Guideline | Purpose |
| Q1A (R2) | Stability testing of new drug substances and products. |
| Q1B | Photostability testing to check light sensitivity. |
| Q1C | Stability testing for new dosage forms. |
| Q1D | Bracketing and matrixing designs in stability studies. |
| Q1E | Evaluation of stability data. |
| Q1F | Stability testing for drugs in climatic zones III & IV (hot/humid regions). |
Typical Stability Conditions (Based on Climatic Zones)
| Condition | Temperature (°C) | Humidity (%RH) | Duration |
| Long-term | 25 ± 2°C | 60 ± 5% RH | 12 months |
| Intermediate | 30 ± 2°C | 65 ± 5% RH | 6 months |
| Accelerated | 40 ± 2°C | 75 ± 5% RH | 6 months |
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