Follow all directions on your prescription label and read all medication guides or instruction sheets. Use the medicine exactly as directed.
Insulin glargine is injected under the skin. A healthcare provider may teach you how to properly use the medication by yourself.
Insulin glargine must not be given with an insulin pump, or mixed with other insulins. Do not inject insulin glargine into a vein or a muscle.
Do not inject this medicine into skin that is damaged, tender, bruised, pitted, thickened, scaly, or has a scar or hard lump.
Read and carefully follow any Instructions for Use provided with your medicine. Do not use insulin glargine if you don't understand all instructions for proper use. Ask your doctor or pharmacist if you have questions.
The Toujeo brand of insulin glargine contains 3 times as much insulin per milliliter (mL) as the Lantus or Basaglar brands. There are 300 units of insulin in 1 mL of Toujeo, and 100 units in 1 mL of Lantus or Basaglar.
If there are any changes in the brand, strength, or type of insulin you use, your dosage needs may change.
If you use an injection pen, use only the injection pen that comes with insulin glargine. Attach a new needle before each use. Do not transfer the insulin from the pen into a syringe.
Never share an injection pen or syringe with another person, even if the needle has been changed. Sharing these devices can allow infections or disease to pass from one person to another.
You may have low blood sugar (hypoglycemia) and feel very hungry, dizzy, irritable, confused, anxious, or shaky. To quickly treat hypoglycemia, eat or drink a fast-acting source of sugar (fruit juice, hard candy, crackers, raisins, or non-diet soda).
Your doctor may prescribe a glucagon injection kit in case you have severe hypoglycemia. Be sure your family or close friends know how to give you this injection in an emergency.
Also watch for signs of high blood sugar (hyperglycemia) such as increased thirst or urination.
Blood sugar levels can be affected by stress, illness, surgery, exercise, alcohol use, or skipping meals. Ask your doctor before changing your dose or medication schedule.
Keep this medicine in its original container protected from heat and light. Do not draw insulin from a vial into a syringe until you are ready to give an injection. Do not freeze insulin or store it near the cooling element in a refrigerator. Throw away any insulin that has been frozen.
Storing unopened (not in use) Basaglar or Lantus:
Refrigerate and use until expiration date; or
Store at room temperature and use within 28 days.
Storing unopened (not in use) Toujeo:
Refrigerate and use until expiration date.
Storing opened (in use) Basaglar or Lantus:
Store the vial in a refrigerator or at room temperature and use within 28 days.
Store the injection pen at room temperature (do not refrigerate) and use within 28 days.
Storing opened (in use) Toujeo:
Store the injection pen at room temperature (do not refrigerate) and use within 42 days.
Do not store an injection pen with the needle attached.
Do not use the medicine if it looks cloudy, has changed colors, or has any particles in it. Call your pharmacist for new medicine.
Wear a diabetes medical alert tag in case of emergency. Any medical care provider who treats you should know that you have diabetes.
Use a needle and syringe only once and then place them in a puncture-proof "sharps" container. Follow state or local laws about how to dispose of this container. Keep it out of the reach of children and pets.
 Detailed Insulin glargine dosage information
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What happens if I miss a dose?
Call your doctor for instructions if you miss a dose of insulin glargine. You should not use more than one dose in a 24-hour period unless your doctor tells you to.
Get your prescription refilled before you run out of medicine completely.
What happens if I overdose?
Seek emergency medical attention or call the Poison Help line at 1-800-222-1222. Insulin overdose can cause life-threatening hypoglycemia. Symptoms include drowsiness, confusion, blurred vision, numbness or tingling in your mouth, trouble speaking, muscle weakness, clumsy or jerky movements, seizure (convulsions), or loss of consciousness.
