Lantus (Insulin Glargine) Coupons & Prices

Looking for a Lantus coupon? Rx.com offers a free cash-price coupon for Lantus (insulin glargine), a once-daily long-acting basal insulin used to help control blood sugar in adults and children age 6 and older with type 1 diabetes, and in adults with type 2 diabetes. Enter your ZIP above to see today's discounted price at pharmacies near you. The Rx.com coupon is a cash-price discount you can use whether you are uninsured, on Medicare, or paying out of pocket, and it can be an alternative when a manufacturer savings card is not accepted.

What is Lantus and how does it work?

Lantus is a brand name for insulin glargine, a long-acting human insulin analog known as a basal insulin. It is FDA-approved to improve glycemic (blood sugar) control in adults and pediatric patients age 6 and older with type 1 diabetes, and in adults with type 2 diabetes. Given as a once-daily injection under the skin, it provides steady, background insulin coverage over roughly 24 hours to help keep blood sugar levels stable between meals and overnight.

Lantus is not a fast-acting mealtime insulin and is not used to treat diabetic ketoacidosis. It is available as a vial and as the Lantus SoloStar prefilled pen. Always use it exactly as your healthcare provider directs.

Lantus manufacturer savings card vs. the Rx.com cash coupon

Sanofi, the maker of Lantus, offers an official manufacturer savings program you can find on the Lantus brand website (Lantus.com). Manufacturer copay cards like this are generally limited to people with commercial (private) insurance and typically exclude anyone covered by Medicare, Medicaid, or other government programs. Program terms, eligibility, and any limits vary and can change, so review the details on the manufacturer's site before relying on it.

The Rx.com cash coupon works differently: it is a discount on the cash price, so it can help if you are uninsured, covered by Medicare, or if the manufacturer card is declined at the pharmacy. You cannot combine a cash coupon with insurance on the same purchase, but you can compare which one costs less. If cost is a barrier, ask your provider or pharmacist about Sanofi's patient assistance program, which may help eligible patients who meet income and insurance criteria. Enter your ZIP above to see today's Lantus price with the Rx.com coupon.

The biggest savings lever: interchangeable insulin glargine

Insulin glargine is available in lower-cost versions that are the same insulin as Lantus. Semglee and Rezvoglar are FDA-approved biosimilars of Lantus, and Semglee is interchangeable, meaning a pharmacist may be able to substitute it for Lantus depending on state law and your prescription. Basaglar is another insulin glargine product. Asking your prescriber or pharmacist whether an interchangeable or biosimilar insulin glargine is right for you is often the single biggest way to lower your cost.

Other basal (long-acting) insulins your provider might discuss include Toujeo (a more concentrated insulin glargine) and Tresiba (insulin degludec). Lantus is often paired with a rapid-acting mealtime insulin such as Humalog or NovoLog. Do not switch insulins on your own; any change should be made with your healthcare provider, who will adjust your dose and monitor your blood sugar.

Important safety information

The most common and potentially serious side effect of Lantus is hypoglycemia (low blood sugar), which can be life-threatening. Your risk rises with changes in diet, activity level, or other blood-sugar-lowering medicines, so know the warning signs and how to treat a low. Lantus can also lower potassium (hypokalemia), and combining it with thiazolidinediones (TZDs) may cause fluid retention and heart failure in some people. Serious allergic reactions, including anaphylaxis, can occur.

Do not use Lantus during an episode of low blood sugar. Never share pens or needles with another person, even if the needle is changed, because of the risk of passing on bloodborne infections. Do not dilute or mix Lantus with any other insulin or solution, and do not give it into a vein or through an insulin pump. People with kidney or liver problems may need a dose adjustment. This is general information, not medical advice, talk with your healthcare provider or pharmacist about your specific situation.