You might. Lantus is a long-acting insulin that’s meant work over the course of an entire day. Long-acting insulin is typically called basal or “background” insulin because it helps control blood sugar levels between meals and overnight while you sleep.
However, Lantus isn’t typically used to control blood sugar spikes after meals. You may need a rapid-acting insulin, short-acting insulin, or intermediate-acting insulin to fine-tune your blood sugar level control. Many people who use a long-acting insulin such as Lantus will also need rapid-acting or short-acting insulin to control blood sugar levels after meals.
If you do take more than one type of insulin, don’t mix Lantus in the same syringe with any other insulins. This could change how well the insulins work.
If you have any questions about when or how to take each type of insulin, talk with your doctor or pharmacist.