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Insulin Glargine Solostar Pen

Generic name: insulin glargine

Brand names: Basaglar KwikPen, Insulin Glargine Prefilled Pen, Insulin Glargine Solostar Pen, Lantus, Lantus Solostar Pen, Semglee (Prefilled Pen), Semglee (Vial)

Last updated November 2, 2026 0 views
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What is Insulin Glargine Solostar Pen?

Insulin Glargine Solostar Pen is a long-acting insulin that begins to work several hours after you inject it and continues to work steadily for 24 hours.

Insulin Glargine Solostar Pen is used to help control blood sugar levels in people with diabetes mellitus.

Toujeo is for adults with type 1 or type 2 diabetes.

Basaglar, Lantus, and Semglee are for adults with type 1 or type 2 diabetes and for children who are at least 6 years old with type 1 diabetes (not type 2).

For type 1 diabetes, Insulin Glargine Solostar Pen is used along with a short-acting insulin that you take before meals.

Insulin Glargine Solostar Pen may also be used for other reasons not listed in this medication guide.

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Warnings

Never share an injection pen, even if you changed the needle.

This section was rewritten for readability and reviewed for meaning.

Before taking this medicine

You should not use Insulin Glargine Solostar Pen if you are allergic to insulin, or if you are experiencing hypoglycemia (low blood sugar) or diabetic ketoacidosis (contact your doctor for treatment).

Insulin Glargine Solostar Pen is not approved for anyone younger than 6 years old, and some brands are only for adults. Do not use this medicine to treat type 2 diabetes in a child of any age.

Tell your doctor if you have ever had:

  • liver or kidney disease; or
  • heart failure or other heart problems.

Inform your doctor if you also take pioglitazone or rosiglitazone (which may be in combination with glimepiride or metformin). Using certain oral diabetes medications while taking insulin may raise your risk of serious heart problems.

Let your doctor know if you are pregnant or breastfeeding.

Follow your doctor's instructions regarding the use of this medicine if you are pregnant or become pregnant. Managing diabetes is very important during pregnancy.

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Insulin Glargine Solostar Pen side effects

Get emergency medical help if you have signs of an insulin allergy: redness or swelling where you injected, itchy rash all over your body, trouble breathing, fast heartbeats, feeling faint, or swelling in your tongue or throat.

Insulin Glargine Solostar Pen may cause serious side effects. Call your doctor right away if you have:

  • rapid weight gain, swelling in your feet or ankles;
  • shortness of breath; or
  • low blood potassium--leg cramps, constipation, irregular heartbeats, fluttering in your chest, increased thirst or urination, numbness or tingling, muscle weakness or feeling limp.

Common side effects of Insulin Glargine Solostar Pen may include:

  • low blood sugar;
  • swelling, weight gain;
  • allergic reaction, itching, rash; or
  • thickening or hollowing of the skin where you injected the medicine.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You can report side effects to FDA at 1-800-FDA-1088.

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How should I use Insulin Glargine Solostar Pen?

Follow all directions on your prescription label and read all medication guides or instruction sheets. Use the medicine exactly as directed.

Insulin Glargine Solostar Pen is injected under the skin, usually once per day at the same time of day.

When treating type 1 diabetes, use your short-acting insulin before meals as directed by your doctor.

Insulin Glargine Solostar Pen must not be given with an insulin pump, or mixed with other insulins. Do not inject Insulin Glargine Solostar Pen into a vein or a muscle.

Ask your doctor or pharmacist if you don't understand how to use an injection.

Prepare an injection only when you are ready to give it. Call your pharmacist if the medicine looks cloudy, has changed colors, or has particles in it.

Your healthcare provider will show you where to inject Insulin Glargine Solostar Pen. Do not inject into the same place two times in a row.

Avoid injecting into skin that is damaged, tender, bruised, pitted, thickened, scaly, or has a scar or hard lump.

Toujeo contains 300 units of Insulin Glargine Solostar Pen per milliliter (mL), which is 3 times stronger than brands that contain 100 units per mL.

Your dose needs may change if you switch to a different brand, strength, or form of this medicine. Avoid medication errors by using only the medicine your doctor prescribes.

If you use an injection pen, use only the injection pen that comes with Insulin Glargine Solostar Pen. Attach a new needle before each use. Do not transfer the insulin from the pen into a syringe.

Never share an injection pen, even if you changed the needle. Sharing these devices can pass infections from person to person.

Blood sugar can be affected by stress, illness, surgery, exercise, alcohol use, or skipping meals.

Low blood sugar (hypoglycemia) can make you feel very hungry, dizzy, irritable, or shaky. To quickly treat hypoglycemia, eat or drink hard candy, crackers, raisins, fruit juice, or non-diet soda. Your doctor may prescribe glucagon injection in case of severe hypoglycemia.

Tell your doctor if you have frequent symptoms of high blood sugar (hyperglycemia) such as increased thirst or urination. Ask your doctor before changing your medication dosage.

Keep this medicine in its original container protected from heat and light. 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) Insulin Glargine Solostar Pen:

  • Refrigerate and use until expiration date; or
  • (Basaglar, Lantus, or Semglee) Store at room temperature (below 86 degrees Fahrenheit) and use within 28 days.

Storing opened (in use) Insulin Glargine Solostar Pen:

  • 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.
  • Store Toujeo at room temperature below 86 F (do not refrigerate) and use within 56 days.

Do not store an injection pen with the needle attached. Do not reuse a needle or syringe. Place them in a puncture-proof "sharps" container and dispose of it following state or local laws. Keep out of the reach of children and pets.

Wear a medical alert tag or carry an ID card to let others know you have diabetes.

What happens if I miss a dose?

Call your doctor for guidance if you miss a dose. Do not use more than one dose in a 24-hour period unless your doctor instructs you to.

Make sure to get your prescription refilled before you completely run out of medicine.

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What happens if I overdose?

Seek emergency medical help or call the Poison Help line at 1-800-222-1222. An insulin overdose can lead to severe 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.

Do not drive or do anything dangerous until you know how Insulin Glargine Solostar Pen will affect you. Your reactions might be impaired.

Avoid medication mistakes by always checking the medicine label before injecting your insulin.

Do not drink alcohol or use medicines that have alcohol in them. It may interfere with your diabetes treatment.

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What other drugs will affect Insulin Glargine Solostar Pen?

Many medicines can change your blood sugar levels and may also impact Insulin Glargine Solostar Pen. This includes both prescription and over-the-counter drugs, vitamins, and herbal products. Make sure to inform your doctor about all the other medicines you are taking. Not all possible interactions are mentioned here.

Find detailed information on biosimilars for this medication.

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Common questions about insulin glargine

How and where should I inject insulin?
Injecting insulin is not difficult, but it does take a bit of practice. There are three main sites where insulin can be injected: the stomach area except for a 2-inch circle around your navel, and the soft part of your waist, but not anywhere near your spine; the top and outer part of your thighs, but not your inner thighs or anywhere close to your knee; the outer back of your upper arm where there is a pocket of fatty tissue. Continue reading
When is the best time to take Toujeo?
Toujeo may be given at any time of the day; however, once you have chosen a time, it is best to inject Toujeo within three hours of that time every day. If needed, you can change the time you administer Toujeo, just talk to your doctor about this. Continue reading
How long can Toujeo stay out of the refrigerator?
Toujeo can stay out of the refrigerator for up to 56 days (8 weeks) according to the prescribing information written on 03/2023. If Toujeo if left out the refrigerator for more than 20 or 30 minutes, it should not be put back into the refrigerator. Continue reading
What are the different types of insulin?
Insulins are usually grouped as fast-acting, intermediate-acting, or long-acting. Within these groups, they can be further classified as human insulin and human insulin analogs. An insulin analog is a human insulin that has one or two amino acids changed which affects how quickly it is absorbed after injection and how fast or slow it acts. Insulin analogs are usually given within 15 minutes of a meal or at the same time as food. Continue reading
Soliqua vs Lantus: What’s the difference between them?
Soliqua is a combination of insulin glargine plus lixisenatide, and Lantus only contains insulin glargine. Both are once-daily injections that are given under the skin (subcutaneously), but Soliqua can only be used in adults with type 2 diabetes whereas Lantus may be used to treat both type 1 and type 2 diabetes in adults and children over the age of six years. Both are made by Sanofi-Aventis. Continue reading
Can Toujeo be given twice a day?
Even though Toujeo is usually given once a day, some people may experience better blood sugar control if the dose is split and given twice a day (every 12 hours). Continue reading
How many pens are in a box of Toujeo?
There are three pens in a box of Toujeo Solostar. There are two pens in a box of Toujeo Max Solostar. Continue reading
Is Toujeo a fast or long-acting insulin?
Toujeo is a long-acting insulin that is usually given once a day. Toujeo lasts for up to 36 hours. Continue reading
What is the difference between Soliqua and Xultophy?
The main difference between Soliqua and Xultophy is what is inside each pen. Both are once-a-day shots for type 2 diabetes that combine a long-acting (basal) insulin with a GLP-1 medicine. Soliqua 100/33 pairs insulin glargine (Lantus) with lixisenatide (Adlyxin). Xultophy 100/3.6 pairs insulin degludec (Tresiba) with liraglutide (Victoza). They also differ in how and when you inject them, their heart-health data, common side effects, and cost Continue reading

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Before you take this medicine: the information on this page is general and may not cover your personal circumstances. Read the label supplied with your medicine and ask a pharmacist or doctor if you are unsure, especially if you are pregnant, breastfeeding, taking other medicines or managing a long-term condition.
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