Below are the duration and onset-of-action times for Lantus.
Lantus doesn’t have a peak time. (Peak time is the amount of time it takes for a drug to reach its maximum effect.) The effect of Lantus remains steady for up to 24 hours after it’s injected.
The duration of this drug’s effect in your body is about 24 hours. In other words, each dose of Lantus keeps working in your body for up to 24 hours after you inject it.
Lantus isn’t a fast-acting insulin. Fast-acting insulins start working in the body within 30 minutes of being injected.
Instead, Lantus is a long-acting insulin. Its onset time is 1.5 to 2 hours. This means the drug begins working in your body within 1.5 to 2 hours after you inject it.
If you have more questions about the peak, duration, and onset of Lantus, talk with your doctor or pharmacist.