Key takeaways
Lantus (insulin glargine) and Toujeo (insulin glargine) are both long-acting insulins used to manage blood sugar levels in people with Type 1 and Type 2 diabetes. They share the same active ingredient, insulin glargine, and are both injected under the skin once daily. However, there are key differences between the two. Lantus is available in a concentration of 100 units/mL, while Toujeo is more concentrated at 300 units/mL, making it a better choice for those needing higher doses. Lantus typically lasts up to 24 hours, whereas Toujeo can last up to 36 hours, providing longer blood sugar control. Lantus is available as a generic or brand-name medication, while Toujeo is only available as a brand-name medication. Common side effects for both include low blood sugar, weight gain, and common cold symptoms. Neither medication should be mixed with other insulins in the same syringe, and you should avoid sharing pens or needles to prevent infections.
