Key takeaways
Levemir (insulin detemir) and Toujeo (insulin glargine) are both long-acting insulins used to manage diabetes, but they have some key differences. Levemir can be injected once or twice daily, while Toujeo is typically injected once daily. Toujeo is an ultra-long-acting insulin that lasts up to 36 hours, whereas Levemir lasts up to 24 hours. Toujeo is more concentrated, containing 300 units/mL of insulin glargine, making it suitable for those needing higher doses, while Levemir does not have this higher concentration option. Levemir is available in vials and FlexPens, but Toujeo only comes in prefilled pens. Levemir Flexpens has been discontinued as of April 2024, and vials will be discontinued by December 2024, whereas Toujeo is only available as a brand. Both medications can cause low blood sugar and should not be mixed with other insulins within the same syringes.
