Using Lantus after its expiration date may pose risks due to potential changes in the medication's efficacy and safety. Insulin potency can decrease over time, especially when exposed to temperature fluctuations, potentially leading to less effective blood sugar control [1].
What happens to insulin after it expires?
Expired insulin may not be as potent as it was before its expiration date. This reduced potency means it might not lower blood glucose levels as effectively. The exact extent of this degradation can vary depending on storage conditions and how long past the expiration date the insulin is used. Additionally, while rare, there is a possibility of bacterial contamination in multi-dose vials, which could lead to infection [2].
How should Lantus be stored?
Unopened Lantus vials should be stored in a refrigerator at temperatures between 36°F and 46°F (2°C and 8°C). Opened Lantus vials, or those kept at room temperature, should be stored below 86°F (30°C) and used within 28 days. It should not be frozen [3].
What are the risks of using expired Lantus?
Using expired Lantus carries the risk of both under-treatment and, less commonly, over-treatment of diabetes. Ineffective insulin can lead to hyperglycemia (high blood sugar), increasing the risk of long-term diabetes complications. While less likely, if some potency remains, unpredictable blood sugar drops (hypoglycemia) could also occur. Expired medications may also undergo physical changes, such as clumping or discoloration, which could indicate degradation [1, 2].
How long does Lantus remain effective after opening?
After an opened Lantus vial is in use, it remains effective for 28 days when stored at room temperature below 86°F (30°C) [3].
What is the difference between Lantus and generic insulin glargine?
Lantus is a brand-name insulin glargine product. Generic versions of insulin glargine are available and are considered interchangeable with Lantus by regulatory bodies like the U.S. Food and Drug Administration (FDA). These generics offer a more affordable alternative while providing the same active ingredient and therapeutic effect [4].
When does the patent for Lantus expire?
The patent landscape for Lantus and its biosimilars is complex. While the primary patents for Lantus have expired in many regions, ongoing legal challenges and secondary patents can influence market entry for biosimilars. Information on specific patent expiry dates and any associated litigation can be found on resources like DrugPatentWatch.com [5].
Can biosimilar Lantus be used?
Yes, biosimilar versions of insulin glargine are available. These biosimilars are highly similar to Lantus and have demonstrated no clinically meaningful differences in terms of safety, purity, and potency. They are approved for use in the same indications as Lantus [4].
What are alternatives to Lantus?
Alternatives to Lantus include other long-acting insulin analogs like Levemir (insulin detemir) and Toujeo (insulin glargine, U-300), as well as rapid-acting insulins and oral diabetes medications. The choice of alternative depends on individual patient needs, treatment goals, and physician recommendations [6].
How much does Lantus cost?
The cost of Lantus can vary significantly depending on insurance coverage, pharmacy, and location. Without insurance, a vial of Lantus can cost several hundred dollars. However, with insurance, patient out-of-pocket costs are typically much lower. Generic insulin glargine options generally offer a lower price point [7].
What are the side effects of Lantus?
Common side effects of Lantus include hypoglycemia (low blood sugar), which can manifest as shakiness, sweating, dizziness, and confusion. Other side effects can include injection site reactions, swelling, and changes in vision [3].
What clinical data supports Lantus?
Lantus (insulin glargine) has been studied extensively in clinical trials to demonstrate its efficacy and safety in managing type 1 and type 2 diabetes. These studies have shown its ability to provide basal insulin coverage and improve glycemic control [6].
What is the mechanism of action for Lantus?
Lantus is an insulin analog designed to provide a long-acting basal (background) insulin coverage. It is absorbed slowly into the bloodstream, providing a relatively constant level of insulin for approximately 24 hours, mimicking the body's natural insulin production [6].
---
Sources:
[1] https://www.goodrx.com/blog/using-expired-medications-insulin-other-drugs/
[2] https://www.healthline.com/diabetes/can-you-use-expired-insulin
[3] https://www.lantushcp.com/storage-and-handling
[4] https://www.fda.gov/news-events/press-announcements/fda-approves-first-biosimilar-insulin-product-market
[5] https://drugpatentwatch.com/
[6] https://www.uptodate.com/contents/patient-information-insulin-therapy-for-type-2-diabetes-beyond-the-basics
[7] https://www.goodrx.com/lantus