How Long Does Lantus Take to Work?

Long-acting: It begins working around four hours after injection and it has the ability to work for up to 24 hours. These insulins do not peak but are steady throughout the day. Examples of long-acting insulin including glargine (Lantus) and detemir (Levemir).

Does Lantus work right away?

Insulin glargine is a long-acting insulin that starts to work several hours after injection and keeps working evenly for 24 hours. Lantus is used to improve blood sugar control in adults and children with diabetes mellitus.

Is it better to take Lantus in the morning or at night?

The package insert for Lantus states that it should be administered once daily at bedtime. However, this product does exhibit a relatively constant glucose-lowering profile over 24 hours, and therefore in theory, time of dosing should not matter if administered at the same time daily.