Lantus Solostar (Insulin Glargine)
Lantus SoloStar
What is Lantus Solostar?
Lantus SoloStar (insulin glargine) is a long-acting prescription insulin pen used to help control blood sugar levels in adults and children with type 1 or type 2 diabetes. It provides up to 24 hours of steady blood sugar control with a once-daily injection and is commonly used alongside mealtime insulin or other diabetes medications.
Side Effects
- Dry mouth, increased thirst, muscle cramps, nausea, vomiting, uneven heartbeat
- Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing
- Rapid weight gain, swelling in your hands, ankles, or feet, trouble breathing, tiredness
Warnings
- Your doctor will do lab tests at regular visits to check on the effects of this medicine. Keep all appointments.
- Tell your doctor if you are pregnant or breastfeeding, or if you have kidney disease, liver disease, heart disease (including heart failure), or ketoacidosis (high ketones and acid in the blood).
- This medicine may cause the following problems:Low blood sugar (more likely if you also take other medicines, including beta-blockers)Fluid retention or heart failure (when used with thiazolidinedione [TZD] medicine)
- This medicine can cause low blood sugar. Do not drive or do anything else that could be dangerous until you know how this medicine affects you.
- Keep all medicine out of the reach of children. Never share your medicine with anyone.
Prescription savings · · · ·
What is Lantus Solostar ?
Lantus SoloStar (insulin glargine) is a long-acting prescription insulin pen used to help control blood sugar levels in adults and children with type 1 or type 2 diabetes. It provides up to 24 hours of steady blood sugar control with a once-daily injection and is commonly used alongside mealtime insulin or other diabetes medications.
- Dry mouth, increased thirst, muscle cramps, nausea, vomiting, uneven heartbeat
- Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing
- Rapid weight gain, swelling in your hands, ankles, or feet, trouble breathing, tiredness
- Fever, chills, cough, stuffy or runny nose, sore throat, body aches
- Shaking, trembling, sweating, fast or pounding heartbeat, lightheadedness, hunger, confusion
- Your doctor will do lab tests at regular visits to check on the effects of this medicine. Keep all appointments.
- Tell your doctor if you are pregnant or breastfeeding, or if you have kidney disease, liver disease, heart disease (including heart failure), or ketoacidosis (high ketones and acid in the blood).
- This medicine may cause the following problems:Low blood sugar (more likely if you also take other medicines, including beta-blockers)Fluid retention or heart failure (when used with thiazolidinedione [TZD] medicine)
- This medicine can cause low blood sugar. Do not drive or do anything else that could be dangerous until you know how this medicine affects you.
- Keep all medicine out of the reach of children. Never share your medicine with anyone.
- Keep all medicine out of the reach of children. Never share your medicine with anyone.
Lantus Solostar (Insulin Glargine) Coupons & Prices
Lantus SoloStar
Weight-loss medication, prescribed online
Licensed U.S. providers · No insurance needed · Shipped to your door
Lantus Solostar prices by dosage
Lowest cash price with a free Rx.com coupon vs. the average retail price.
| Dosage | Quantity | Retail price | Rx.com price |
|---|---|---|---|
| 3ml of 100units/ml · Solostar Pen | 3 | $31.95 | $23.85 |
Cash prices near ZIP 77433; updated regularly. Actual pharmacy price may vary.
Looking for a Lantus SoloStar coupon? Lantus SoloStar is Sanofi's brand-name long-acting insulin (insulin glargine) delivered through a prefilled U-100 injection pen. If your out-of-pocket cost is high, an Rx.com cash coupon can help lower the price you pay at the pharmacy counter, even without insurance. Enter your ZIP code above to see today's Lantus SoloStar price at pharmacies near you.
What is Lantus SoloStar and how does it work?
Lantus SoloStar is a brand of insulin glargine, a long-acting human insulin analog known as a basal insulin. It is FDA-approved to improve blood sugar (glycemic) control in adults and children 6 years and older with type 1 diabetes, and in adults with type 2 diabetes. It comes as a prefilled SoloStar pen (100 units/mL, U-100) and is given as a once-daily injection under the skin.
As a basal insulin, Lantus provides steady, long-acting background insulin coverage throughout the day. It is not used to treat diabetic ketoacidosis. Lantus SoloStar is the same medicine as Lantus in vial form, just delivered through the prefilled pen. Your provider decides the right dose and timing for you.
Lantus SoloStar cost: manufacturer savings card vs. Rx.com cash coupon
The word "coupon" for a brand like Lantus SoloStar usually points to two very different things. The Sanofi manufacturer savings card is generally limited to people with commercial (private) insurance and is typically not available to those on Medicare, Medicaid, or other government plans. You can review the official terms and sign up at the Lantus savings page; eligibility and terms vary, so check there for the current details.
An Rx.com cash coupon works differently. It is a cash-discount price you can use when you are uninsured, when you have Medicare, or when the manufacturer card is declined. You do not use it together with insurance. To compare, enter your ZIP above to see today's Lantus SoloStar cash price near you. Sanofi also offers patient-assistance options for those who qualify; check the manufacturer's website for eligibility.
Biosimilars and alternatives to Lantus SoloStar
There is no cheaper generic version of Lantus SoloStar, but several biosimilar and follow-on insulin glargine products exist that may cost less. These include Basaglar, Semglee, and Rezvoglar. The active ingredient insulin glargine is also sold under other names. Because insulins are complex biologic medicines, do not switch products on your own; ask your provider or pharmacist whether a biosimilar is right for you.
Other long-acting basal insulins your provider might discuss include Toujeo (a more concentrated U-300 insulin glargine, also from Sanofi), Levemir (insulin detemir), and Tresiba (insulin degludec). These are not identical and are not automatically interchangeable, so any change should be guided by your healthcare provider.
Safety and side effects to know
The most common and potentially serious risk with Lantus SoloStar is hypoglycemia (low blood sugar). Your risk can change if your insulin dose, timing, meals, or physical activity change. Lantus has no boxed warning. Other important points: never dilute or mix Lantus with other insulins or solutions, and never share a SoloStar pen between people, even with a new needle, because of the risk of passing along bloodborne infections.
Low potassium (hypokalemia) and, rarely, serious allergic reactions can also occur. Using Lantus with certain other medicines (such as thiazolidinediones or GLP-1 agonists), or having kidney or liver problems, may require dose adjustments. Insulin mix-ups can happen, so always check the label before injecting. This information is not medical advice; talk with your doctor or pharmacist about your full history and any side effects.
This Lantus Solostar information was written and reviewed against authoritative U.S. medical sources — MedlinePlus (U.S. National Library of Medicine), DailyMed, and FDA prescribing information — and checked for accuracy. It is provided for education and is not a substitute for professional medical advice.
Verify the official label: Lantus Solostar on DailyMed (FDA)
Reviewed against FDA labeling · Last reviewed July 2026
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Medical disclaimer: This information is provided for general educational purposes only and is not medical advice. It is not a substitute for professional diagnosis or treatment. Always consult a licensed physician, pharmacist, or other qualified healthcare provider before starting, stopping, or changing any medication or treatment. Never disregard professional medical advice or delay seeking it because of something you read here. If you think you may have a medical emergency, call your doctor or 911 immediately.