Lantus (Insulin Glargine)




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Product Details


Lantus is a medicine for people with Type 1 or Type 2 diabetes. It's a type of insulin that helps control blood sugar. Doctors can switch it with Semglee insulin if needed. Lantus works like Semglee in controlling blood sugar. It comes in a pen and helps your body use sugar better and stops your liver from making too much sugar.


Injections are to be taken once a day, at the same time each day.

Type 1 diabetes treatment: Lantus may use concomitantly with short-acting insulin. The recommended starting dose of Lantus insulin in patients with type 1 diabetes should be approximately one-third of the total daily insulin requirements.

Type 2 diabetes treatment: Recommended starting dose for Lantus insulin in patients with type 2 diabetes who are not currently treated with insulin is 0.2 units/kg or up to 10 units 1x daily.

Always visually confirm that insulin in vial is clear and not cloudy to determine insulin is ready for injection.

Injection may be made into one of 3 acceptable injection sites: back of upper arm / thighs / abdomen (but not within a 2” radius around navel).

Choose a different injection site for every new injection. Do not inject at the same injection site twice to avoid developing lipodystrophy.


Wash your hands.

Prepare syringe for injection, including attaching needle if required depending on the type of syringe you are using.


Insert needle tip through vial covering and into Lantus insulin solution and pull back on plunger handle to fill syringe with insulin, measuring correct amount by looking at measurement points on the syringe.

Once syringe is filled to the correct amount, remove the needle from the vial and keep needle in upright position and firmly in hand as you prepare to administer the injection.

Give yourself the insulin injection in one of the three spots listed above.


The active ingredient in Lantus is Insulin Glargine (Lantus Generic Name – Rezvoglar).


Tell your doctor if you have any history of hypoglycemia, hypokalemia, heart failure, peripheral edema, or fluid retention before starting on Lantus insulin.

Medication is not recommended for the treatment of diabetic ketoacidosis.

Keep insulin stored at the proper temperature as indicated in your medication. Store unopened Lantus vials in your refrigerator until the expiration date listed on the package. Once you open a Lantus vial, you can store it at room temperature or in the refrigerator for 28 days.


There is the possibility of negative drug interactions between Semglee and other Rx medications, including:

  • fluoxetine
  • pentoxifylline
  • pramlintide
  • salicylates
  • octreotide
  • sulfonamide antibiotics
  • DPP-4 inhibitors
  • SGLT-2 inhibitors
  • olanzapine
  • clozapine
  • corticosteroids
  • danazol
  • diuretics
  • estrogens
  • glucagon
  • isoniazid
  • oral contraceptives
  • phenothiazines
  • protease inhibitors
  • albuterol
  • epinephrine
  • terbutaline
  • clonidine
  • guanethidine
  • reserpine

Tell your doctor of all medications you are taking before receiving a medication and proceeding to buy Lantus insulin from Canada.

Side Effects

Side effects from using Lantus are possible, and some users may experience low blood sugar levels, lightheadedness or dizziness, fatigue, sweating, headache, confusion, speech difficulties, or anxiety or irritability. If Lantus side effects are experienced you may choose to discontinue use and speak to your doctor again about interchangeable insulin alternatives to Lantus insulin.

Frequently Asked Questions about Lantus (Insulin Glargine)

What is Lantus?

Lantus is a man-made form of insulin, specifically insulin glargine, used to control blood sugar levels in adults and children with diabetes mellitus. It is a long-acting insulin that starts working several hours after injection and maintains effectiveness for 24 hours.

How is Lantus used?

Lantus is administered as a subcutaneous injection using a SoloStar pen or a vial and syringe. It is typically injected once per day at the same time each day. It should not be mixed with other insulins or solutions.

Who can use Lantus?

Lantus is suitable for adults with type 1 or type 2 diabetes, and for children at least 6 years old with type 1 diabetes.

Can Lantus cause weight gain?

Weight gain can occur with any insulin therapy, including Lantus. It's important to follow a healthy diet and exercise program for weight management.

What are the side effects of Lantus?

Common side effects include hypoglycemia (low blood sugar), which can be severe. Other side effects may include weight gain, swelling, allergic reactions, and skin changes at the injection site.

What should I do if I miss a dose or overdose on Lantus?

If you miss a dose, contact your doctor for instructions. Do not take more than one dose in a 24-hour period unless directed by a doctor. In case of overdose, seek emergency medical attention. Symptoms of overdose include severe hypoglycemia.

What other drugs will affect Lantus?

Many drugs can affect blood sugar levels and may interact with Lantus. This includes prescription and over-the-counter medicines, vitamins, and herbal products. Always inform your healthcare providers about all medicines you use.

How does Lantus compare to other similar insulins?

Lantus, Toujeo, and Basaglar all contain insulin glargine. Toujeo is more concentrated than Lantus, and Basaglar is considered a "follow-on" to Lantus but not a biosimilar. These cannot be substituted for each other without a prescription.

Are there any special instructions or tips for using Lantus?

It's important to use Lantus exactly as directed by your doctor. Store Lantus pens as recommended and never share them with others. Be aware of symptoms of hypoglycemia and how to treat it. Monitor blood sugar levels regularly when adjusting the dosage.

How effective is Lantus?

Lantus starts working within 70 minutes after injection, with full effects developing within one to three hours. It remains effective for up to 24 to 36 hours depending on its concentration.

IMPORTANT NOTE: The above information is intended to increase awareness of health information and does not suggest treatment or diagnosis. This information is not a substitute for individual medical attention and should not be construed to indicate that use of the drug is safe, appropriate, or effective for you. See your health care professional for medical advice and treatment.

Product Code : 13877

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