Head-to-head comparisons of medication uses, side effects, warnings, and more.
Key takeaways
Levemir (insulin detemir) and Basaglar (insulin glargine) are both long-acting insulins used to control blood sugar levels in people with diabetes. Levemir can be injected once or twice daily, while Basaglar is typically injected once daily. Levemir is available in both vials and pens, whereas Basaglar only comes in pen form. Levemir has a lower risk of weight gain compared to Basaglar, which is known to cause weight gain. Additionally, Levemir can be stored at room temperature for up to 42 days once opened, while Basaglar can only be stored at room temperature for up to 28 days. Both medications can cause low blood sugar and should not be mixed with other insulins within the same syringes. Levemir Flexpens has been discontinued as of April 2024, and vials will be discontinued by December 2024 while Basaglar is only available as a brand name, making it potentially more expensive.
Levemir (insulin detemir)
Basaglar (insulin glargine)
Levemir (insulin detemir)
Basaglar (insulin glargine)
Summary of Levemir vs. Basaglar
Summary for Insulin
Prescription only
Levemir (insulin detemir) is a long-acting insulin that helps control high blood sugar levels in children and adults. It's injected under the skin, typically once or twice daily. Like all insulins, Levemir (insulin detemir) can raise your risk for low blood sugar, so make sure to keep fast-acting sugars with you in case your blood sugar level drops too low. This medication comes in vials. But it's also available as a Flexpen for people who have trouble drawing up insulin from the vial.
•Long-lasting insulin that provides consistent, all-day blood sugar control
•Given once per day
•Available as a prefilled pen that can easily fit into your purse or pocket
•Doses can be easily adjusted
•Can use in type 1 diabetic children as young as 6 years old
Cons
•Must be given as an injection under the skin
•Might be difficult for some people to administer correctly
•Can cause weight gain and low blood sugar (hypoglycemia)
•Doesn't come as a vial, which some people might prefer instead of prefilled pens
•Not available as a lower-cost generic yet
Common Side Effects of Levemir vs. Basaglar
Common Side Effects for
•Shakiness, hunger, and other symptoms of low blood sugar (up to 93%, depending on what other blood sugar medications you're taking)
•Common cold involving the nose, throat, and lungs (up to 27%)
•Headache (up to 23%)
•Pain or irritation of the throat (10%)
•Back pain (8%)
•Fever, chills, and other flu-like symptoms (up to 8%)
•Stomach pain (6%)
Please note: These side effects were reported by people who took Levemir (insulin detemir) for type 1 diabetes. Your risk for side effects might be different if you have type 2 diabetes.
Common Side Effects for
•Infection (up to 24%)
•Common cold (up to 16%)
•Respiratory tract infection (up to 8%)
Warnings of Levemir vs. Basaglar
Common Side Effects for
•Infections
•Low blood sugar
•Severe allergic reactions
•Low blood potassium levels
•Swelling from fluids and risk of heart failure
Common Side Effects for
•Risk of infections with pen sharing
•Risk of high and low blood sugar levels
•Dangerously low blood sugar (hypoglycemia)
•Low blood potassium levels
•Swelling and heart failure when used with certain diabetes medications