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Insulin Glargine (rDNA origin) Injection

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(in' su lin glar' geen)

Brand name(s): Lantus

Contents of this page:

Why is this medication prescribed?

Insulin glargine is used to treat type 1 (insulin-dependent) diabetes (formerly called 'juvenile-onset'). It is also used to treat people with type 2 (noninsulin-dependent) diabetes (formerly called 'adult-onset') who need long-acting insulin to control their diabetes. Insulin glargine is a long-acting, man-made version of human insulin. Insulin is a hormone made in the pancreas. Insulin helps move sugar from the blood into other body tissues where it is used for energy. It also helps the body break down carbohydrates, fats, and proteins from the diet. In a person with diabetes, the pancreas does not produce enough insulin for the body's needs, so additional insulin is required. People with diabetes may gradually develop serious nerve, blood vessel, kidney, and eye problems if the diabetes is not controlled properly.

This medication is sometimes prescribed for other uses; ask your doctor or pharmacist for more information.

How should this medicine be used?

Insulin glargine comes as an injection to inject subcutaneously (beneath the skin, not into a vein). It is injected once a day at bedtime. The medication comes in vials (bottles) and also prefilled containers called cartridges. The amount of insulin glargine you need depends on diet, other diseases, exercise, and other drugs you are taking and may change with time. Your doctor will tell you how much you should take. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Take insulin glargine exactly as directed. Do not take more or less of it or take it more often than directed by the package label or prescribed by your doctor.

Insulin glargine controls diabetes but does not cure it. It must be taken regularly. Continue to take insulin glargine even if you feel well. Do not stop taking insulin glargine without talking to your doctor.

You do not have to shake the vial or cartridge of insulin glargine before use. Do not dilute or mix insulin glargine with any other insulin or solution. The syringe must not have any other medicine or residue in it.

If your insulin glargine comes in cartridges, the medication will already be inside. You must only use the OptiPen One Insulin Delivery Device with the cartridges. Before you use the device for the first time, read the written directions that come with it. Ask your doctor, pharmacist, or nurse to show you the right way to use this device. Practice while your health care provider watches.

If your insulin glargine comes in vials, you will have to withdraw (draw up) the medication into a syringe. Before you do this for the first time, read the written directions that come with it. Ask your doctor or pharmacist to show you the right way to withdraw the insulin glargine and to inject the medication subcutaneously. Practice while your health care provider watches.

If your insulin glargine comes in vials you will need to use syringes. Always use a syringe that is marked for U-100 insulin products. If you use the wrong syringe, you may get the wrong dose, and your blood glucose level may end up being too low or too high.

Plastic syringes are disposable; use a new one for each injection. Used needles will hurt more and may cause an infection. Never share needles and syringes. To withdraw insulin glargine into the syringe, follow these steps:

To inject your insulin glargine dose, follow these steps:

Use a different site for each injection, about 1 inch away from the previous injection but in the same general area (for example, the thigh). Use all available sites in the same general area before switching to a different area (for example, the upper arm). Do not use the same injection site more often than once every month.

What special precautions should I follow?

Before taking insulin glargine,

What special dietary instructions should I follow?

Be sure to follow all exercise and dietary recommendations made by your doctor or dietitian. It is important to eat a healthful diet. Alcohol increases blood sugar; ask your doctor for information on how much is safe to drink. Do not start a diet or an exercise program without talking to your doctor. Your insulin dose may need to be changed.

What should I do if I forget a dose?

Before you start taking insulin glargine, ask your doctor what to do if you forget to take a dose or if you accidently take an extra dose. Write these directions down so you can refer to them later.

What side effects can this medication cause?

You should know the symptoms of low and high blood sugar and what to do if you have them.

If you have any of the symptoms of low blood sugar (hypoglycemia), eat or drink a food or beverage with sugar in it, such as hard candy or fruit juice, and call your doctor immediately. The symptoms of low blood sugar include:

If you have any of the symptoms of high blood sugar (hyperglycemia), call your doctor immediately. The symptoms of high blood sugar include:

Although side effects from insulin glargine are not common, they can occur. Tell your doctor if any of these symptoms are severe or do not go away:

If you experience any of the following symptoms, call your doctor immediately:

If your glucose is often high, you can develop a serious condition called diabetic ketoacidosis. This can be life threatening. If your blood tests show high amounts of glucose or your urine tests show high amounts of glucose or acetone, or if you have signs of ketoacidosis, you need to call your doctor immediately. Do not use insulin glargine to treat diabetic ketoacidosis. The symptoms of diabetic ketoacidosis include:

What storage conditions are needed for this medicine?

Store unopened insulin glargine vials and cartridges in the refrigerator. Never allow insulin glargine to freeze; do not use insulin glargine that has been frozen and thawed. Never heat insulin glargine to warm it. Unopened refrigerated insulin glargine can be stored until the date shown on the company's label.

If no refrigerator is available (for example, when on vacation), store the vials or cartridges at room temperature and away from direct sunlight and extreme heat. Unrefrigerated 10-ml vials or cartridges can be used within 28 days or they must be thrown away. Unrefrigerated 5-ml vials can be used for 14 days or they must be thrown away. Refrigerated 5-ml vials can be used for up to 28 days. Once the cartridge is placed in the OptiPen One Insulin Delivery Device, do not refrigerate. Throw away any insulin that has been exposed to extreme heat or cold.

When traveling, protect your insulin glargine vials from bumps or other rough handling (wrap them in clothes in the middle of a suitcase). Do not keep insulin in hot areas of a car such as the glove compartment or trunk. When traveling by airplane, do not put insulin in checked luggage since the luggage may be lost. Always keep insulin with you or in carry-on luggage.

Throw away any medication that is outdated or no longer needed. Talk to your pharmacist about the proper disposal of your medication.

In case of emergency/overdose

In case of overdose, call your local poison control center at 1-800-222-1222. If the victim has collapsed or is not breathing, call local emergency services at 911.

What other information should I know?

Keep all appointments with your doctor and the laboratory. Your blood sugar and glycosylated hemoglobin (HbA1c) should be checked regularly to determine your response to insulin glargine.

To monitor the effectiveness of insulin glargine, measure the amount of sugar (glucose) in your blood or urine (when blood sugar is above a certain high level, you will have sugar in your urine). For measuring the amount of glucose in your blood, you can use a blood glucose meter. For the urine measurements, you will need special paper tapes, tablets, or plastic strips that change color depending on how much sugar is present. Your doctor also may ask you to test your urine for ketones (substances present when diabetes is not under control). Follow your doctor's directions for testing your urine and blood and for recording the results. If your blood sugar is high or if sugar or ketones are present in your urine, call your doctor.

Your dose of insulin glargine may need to be changed when you are ill (especially with fever, vomiting, or diarrhea), have emotional changes or stress, gain or lose weight, or change the amount of food you eat or amount of exercise you do. If any of these things happen, call your doctor.

See your dentist twice yearly; see your eye doctor regularly; get your blood pressure checked regularly.

If you travel across time zones, ask your doctor how to time your injections. When you travel, take extra insulin and supplies with you.

Keep yourself and your clothes clean. Wash cuts, scrapes, and other wounds quickly, and do not let them get infected. Wear medical alert identification (a bracelet or tag) that says you have diabetes.

Do not let anyone else take your medication. Ask your pharmacist any questions you have about refilling your prescription.

Last Revised - 01/01/2003


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