Yes, insulin can go bad, even before its expiration date, if not stored correctly.
Spoiled or expired insulin loses its effectiveness in lowering blood glucose levels. According to a source, even insulin that is “in date” can spoil if it's not stored correctly. Expired or spoiled insulin begins to break down and doesn't work as well to lower your blood glucose (sugar) levels. Using expired or spoiled insulin can cause higher than normal blood glucose levels.
Signs of Insulin Spoilage
It's crucial to inspect your insulin before each use. Be on the lookout for the following:
- Changes in appearance: Look for changes in color, cloudiness (for types that should be clear), or the presence of particles.
- Clumping or precipitation: These are signs that the insulin's structure has been compromised.
- Reduced effectiveness: If your blood sugar levels are consistently higher than expected after injecting what should be a normal dose, your insulin may be degrading.
Proper Insulin Storage: Key to Maintaining Effectiveness
| Storage Location | Temperature Range | Notes |
|---|---|---|
| Refrigerator | 36°F to 46°F (2°C to 8°C) | Store unopened insulin in the refrigerator to prolong its shelf life. Avoid freezing. |
| Room Temperature | Up to 86°F (30°C) | Once opened, insulin can typically be stored at room temperature for up to 28 days (check the specific product information for your insulin type). |
| Avoid | Extreme temperatures and direct sunlight | Keep insulin away from direct sunlight and extreme temperatures (both hot and cold), as these can degrade the insulin. Never leave insulin in a car on a hot day. |
Consequences of Using Spoiled Insulin
Using insulin that has gone bad can lead to:
- Higher than normal blood glucose levels.
- Increased risk of hyperglycemia (high blood sugar).
- Potential health complications from poorly managed diabetes.
Therefore, always check your insulin before use, adhere to proper storage guidelines, and discard any insulin that shows signs of spoilage or has exceeded its expiration date.
