Short answer: The Lantus label has no missed-dose instructions. It says to inject once daily, at any time of day but at the same time every day, and to check blood sugar more often during any change to the insulin routine. Unlike Tresiba, it gives no rule for a late dose, so ask your diabetes team how to handle a missed one.
| Situation | What the label says |
|---|---|
| Schedule | Once daily, any time of day but the same time every day (2.2) |
| Missed-dose rule | None in the label |
| During regimen changes | Check blood glucose more often (2.1) |
| Action profile | Relatively constant over 24 hours with no pronounced peak (12.3) |
| Type 1 diabetes | Used together with short-acting insulin (2.2) |
No. We checked the Lantus prescribing information, Patient Information and Instructions for Use on DailyMed. None includes a missed-dose instruction.
Section 2.2 says Lantus is given under the skin once daily at any time of day but at the same time every day. The Patient Information says the same: you may take Lantus at any time during the day, but you must take it at the same time every day.
Section 12.3 says insulin levels after an injection showed slower, more prolonged absorption and a relatively constant profile over 24 hours, with no pronounced peak compared with NPH insulin. The label also notes that the time course of action can vary between patients and within the same patient.
Section 2.1 says to check blood glucose more often during changes to a patient's insulin regimen, and section 2.2 says dose changes should only be made under medical supervision with glucose monitoring. A missed or shifted dose is a change worth raising with your diabetes team.
The Tresiba label has a written rule: adults who miss a dose inject during waking hours when they notice, with at least 8 hours between doses. The Lantus label has no matching rule, so the Tresiba window does not carry over to Lantus.
This page summarizes FDA labeling. It is not personalized medical advice; confirm what to do with your prescriber or pharmacist.