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    HomeMedication GuideInsulin Glargine Safety
    Long-acting insulin

    Insulin Glargine: What to Know Before You Take It

    Also sold as Lantus, Basaglar, Toujeo

    What Insulin Glargine Is Used For

    1 INDICATIONS AND USAGE BASAGLAR ® is indicated to improve glycemic control in adults and pediatric patients with type 1 diabetes mellitus and in adults with type 2 diabetes mellitus. BASAGLAR ® is a long-acting human insulin analog indicated to improve glycemic control in adults and pediatric patients with type 1 diabetes mellitus and in adults with type 2 diabetes mellitus. ( 1 ) Limitations of Use : Not recommended for treating diabetic ketoacidosis. ( 1 ) Limitations of Use BASAGLAR is not recommended for the treatment of diabetic ketoacidosis.

    Warnings

    5 WARNINGS AND PRECAUTIONS Never share a BASAGLAR prefilled pen between patients, even if the needle is changed. ( 5.1 ) Hyperglycemia or hypoglycemia with changes in insulin regimen: Make changes to a patient's insulin regimen (e.g., insulin strength, manufacturer, type, injection site or method of administration) under close medical supervision with increased frequency of blood glucose monitoring. ( 5.2 ) Hypoglycemia: May be life-threatening. Increase frequency of glucose monitoring with changes to: insulin dosage, co-administered glucose lowering medications, meal pattern, physical activity; and in patients with renal or hepatic impairment and hypoglycemia unawareness. ( 5.3 , 6.1 ) Hypoglycemia due to medication errors: Accidental mix-ups between insulin products can occur. Instruct patients to check insulin labels before injection. ( 5.4 ) Hypersensitivity reactions: Severe, life-threatening, generalized allergy, including anaphylaxis, can occur. Discontinue BASAGLAR, monitor and treat if indicated. ( 5.5 , 6.1 ) Hypokalemia: May be life-threatening. Monitor potassium levels in patients at risk of hypokalemia and treat if indicated. ( 5.6 ) Fluid retention and heart failure with concomitant use of thiazolidinediones (TZDs): Observe for signs and symptoms of heart failure; consider dosage reduction or discontinuation if heart failure occurs. ( 5.7 ) 5.1 Never Share a BASAGLAR Prefilled Pen Between Patients BASAGLAR prefilled pens must never be shared between patients, even if the needle is changed. Sharing poses a risk for transmission of blood-borne pathogens. 5.2 Hyperglycemia or Hypoglycemia with Changes in Insulin Regimen Changes in an insulin regimen (e.g., insulin strength, manufacturer, type, injection site or method of administration) may affect glycemic control and predispose to hypoglycemia [see Warnings and Precautions ( 5.3 )] or hyperglycemia. Repeated insulin injections into areas of lipodystrophy or localized cutaneous amyloidosis have been reported to result in hyperglycemia; and a sudden change in the injection site (to an unaffected area) has been reported to result in hypoglycemia [see Adverse Reactions ( 6 )] . Make any changes to a patient's insulin regimen under close medical supervision with increased frequency of blood glucose monitoring. Advise patients who have repeatedly injected into areas of lipodystrophy or localized cutaneous amyloidosis to change the injection site to unaffected areas and closely monitor for hypoglycemia. For patients with type 2 diabetes, dosage adjustments of concomitant anti-diabetic products may be needed. 5.3 Hypoglycemia Hypoglycemia is the most common adverse reaction associated with insulins, including BASAGLAR [see Adverse Reactions ( 6.1 )] . Severe hypoglycemia can cause seizures, may be life-threatening or cause death. Hypoglycemia can impair concentration ability and reaction time; this may place an individual and others at risk in situations where these abilities are important (e.g., driving or operating other machinery). BASAGLAR, or any insulin, should not be used during episodes of hypoglycemia [see Contraindications ( 4 )] . Hypoglycemia can happen suddenly and symptoms may differ in each individual and change over time in the same individual. Symptomatic awareness of hypoglycemia may be less pronounced in patients with longstanding diabetes, in patients with diabetic nerve disease, in patients using medications that block the sympathetic nervous system (e.g., beta-blockers) [see Drug Interactions ( 7 )] , or in patients who experience recurrent hypoglycemia. Risk Factors for Hypoglycemia The risk of hypoglycemia after an injection is related to the duration of action of the insulin and, in general, is highest when the glucose lowering effect of the insulin is maximal. As with all insulins, the glucose lowering effect time course of BASAGLAR may vary in different individuals or at different times in the same individual and depends on many conditions, including the area of injection as well as the injection site blood supply and temperature [see Clinical Pharmacology ( 12.2 )] . The risk of hypoglycemia generally increases with intensity of glycemic control. Other factors which may increase the risk of hypoglycemia include changes in meal pattern (e.g., macronutrient content or timing of meals), changes in level of physical activity, or changes to co-administered medication [see Drug Interactions ( 7 )] . Patients with renal or hepatic impairment may be at higher risk of hypoglycemia [see Use in Specific Populations ( 8.6 , 8.7 )] . Risk Mitigation Strategies for Hypoglycemia Patients and caregivers must be educated to recognize and manage hypoglycemia. Self-monitoring of blood glucose plays an essential role in the prevention and management of hypoglycemia. In patients at higher risk for hypoglycemia and patients who have reduced symptomatic awareness of hypoglycemia, increased frequency of blood glucose monitoring is recommended. The long-acting effect of BASAGLAR may delay recovery from hypoglycemia. 5.4 Hypoglycemia Due to Medication Errors Accidental mix-ups between insulin products have been reported. To avoid medication errors between BASAGLAR and other insulins, instruct patients to always check the insulin label before each injection. 5.5 Hypersensitivity Reactions Severe, life-threatening, generalized allergy, including anaphylaxis, can occur with insulins, including BASAGLAR. If hypersensitivity reactions occur, discontinue BASAGLAR; treat per standard of care and monitor until symptoms and signs resolve [see Adverse Reactions ( 6.1 )] . BASAGLAR is contraindicated in patients who have had hypersensitivity reactions to insulin glargine or one of the excipients [see Contraindications ( 4 )] . 5.6 Hypokalemia All insulins, including BASAGLAR, cause a shift in potassium from the extracellular to intracellular space, possibly leading to hypokalemia. Untreated hypokalemia may cause respiratory paralysis, ventricular arrhythmia, and death. Monitor potassium levels in patients at risk for hypokalemia if indicated (e.g., patients using potassium-lowering medications, patients taking medications sensitive to serum potassium concentrations). 5.7 Fluid Retention and Heart Failure with Concomitant Use of PPAR-gamma Agonists Thiazolidinediones (TZDs), which are peroxisome proliferator-activated receptor (PPAR)-gamma agonists, can cause dose-related fluid retention, particularly when used in combination with insulin. Fluid retention may lead to or exacerbate heart failure. Patients treated with insulin, including BASAGLAR, and a PPAR-gamma agonist should be observed for signs and symptoms of heart failure. If heart failure develops, it should be managed according to current standards of care, and discontinuation or dose reduction of the PPAR-gamma agonist must be considered.

    Contraindications

    4 CONTRAINDICATIONS BASAGLAR is contraindicated: During episodes of hypoglycemia [see Warnings and Precautions ( 5.3 )] . In patients with hypersensitivity to insulin glargine or any of the excipients in BASAGLAR [see Warnings and Precautions ( 5.5 )] . During episodes of hypoglycemia. ( 4 ) Hypersensitivity to BASAGLAR or any of its excipients. ( 4 )

    Insulin Glargine Drug Interactions (5)

    Insulin Glargine + Albuterol
    Drugs That May Decrease the Blood Glucose Lowering Effect of BASAGLAR Drugs: Atypical antipsychotics (e.g., olanzapine and clozapine), corticosteroids, danazol, diuretics, estrogens, glucagon, isoniazid, niacin, oral contraceptives, phenothiazines, progestogens (e.g., in oral contraceptives), protease inhibitors, somatropin, sympathomimetic agents (e.g., albuterol, epinephrine, terbutaline), and thyroid hormones Intervention: Dose increases and increased frequency of glucose monitoring may be…
    Moderate interaction
    Insulin Glargine + Clonidine
    Drugs That May Increase or Decrease the Blood Glucose Lowering Effect of BASAGLAR Drugs: Alcohol, beta-blockers, clonidine, and lithium salts.
    Moderate interaction
    Insulin Glargine + Fluoxetine
    7 DRUG INTERACTIONS Table 6 includes clinically significant drug interactions with BASAGLAR Table 6: Clinically Significant Drug Interactions with BASAGLAR Drugs That May Increase the Risk of Hypoglycemia Drugs: Antidiabetic agents, ACE inhibitors, angiotensin II receptor blocking agents, disopyramide, fibrates, fluoxetine, monoamine oxidase inhibitors, pentoxifylline, pramlintide, salicylates, somatostatin analogs (e.g., octreotide), and sulfonamide antibiotics.
    Moderate interaction
    Insulin Glargine + Lithium
    Drugs That May Increase or Decrease the Blood Glucose Lowering Effect of BASAGLAR Drugs: Alcohol, beta-blockers, clonidine, and lithium salts.
    Moderate interaction
    Insulin Glargine + Olanzapine
    Drugs That May Decrease the Blood Glucose Lowering Effect of BASAGLAR Drugs: Atypical antipsychotics (e.g., olanzapine and clozapine), corticosteroids, danazol, diuretics, estrogens, glucagon, isoniazid, niacin, oral contraceptives, phenothiazines, progestogens (e.g., in oral contraceptives), protease inhibitors, somatropin, sympathomimetic agents (e.g., albuterol, epinephrine, terbutaline), and thyroid hormones Intervention: Dose increases and increased frequency of glucose monitoring may be…
    Moderate interaction

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    Most-Reported Side Effects

    Based on 243,678 reports in the FDA Adverse Event Reporting System (FAERS). Reports do not prove the drug caused the effect.

    blood glucose increased38,994off label use12,799drug ineffective10,528blood glucose decreased10,484inappropriate schedule of product administration10,129nausea9,897product storage error9,255visual impairment8,804hypoglycaemia7,922diarrhoea7,139fatigue6,936incorrect dose administered6,737

    Explore full Insulin Glargine safety data in our free FDA Safety Explorer

    Ways to Save on Insulin Glargine

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    This information is educational — not medical advice.

    This page is provided for general educational purposes and summarizes publicly available data from sources such as the U.S. Food & Drug Administration. It is not a substitute for the judgment of a licensed clinician and should not be used to start, stop, or change any medication. It may be incomplete or out of date, and individual circumstances vary. Always talk with your prescriber or pharmacist about your specific medications and health conditions. If you think you may have a medical emergency, call 911.

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