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humalog

Humalog (Insulin Lispro Recombinant) is a medication supplied as an injection, solution.

Insulin Lispro Recombinant · by Lilly

Not yet rated· sourced from the FDA label
Rated against independent regulatory sources·Last updated June 7, 2026·How we rate
Verified againstopenFDANIH DailyMedRxClass

Every strength approved under this FDA application (3)

  • Humalog (this page)Insulin Lispro Recombinant 100 UNITS/ML
  • Humalog PenInsulin Lispro Recombinant 100 UNITS/ML
  • Humalog KwikpenInsulin Lispro Recombinant 100 UNITS/ML · Insulin Lispro Recombinant 200UNITS/ML

Key facts

Form
Injectable
Strength
Insulin Lispro Recombinant 100 UNITS/ML
Type
Prescription (Rx)
Brand or generic
Brand-name
Manufacturer
Lilly
FDA application
BLA020563

What is Humalog?

From the FDA label:Insulin lispro is a rapid-acting human insulin analog produced by recombinant DNA technology utilizing a non-pathogenic laboratory strain of Escherichia coli . Insulin lispro differs from human insulin in that the amino acid proline at position B28 is replaced by lysine and the lysine in position B29 is replaced by proline. Chemically, it is Lys(B28), Pro(B29) human insulin analog and has the empirical formula C 257 H 383 N 65 O 77 S 6 and a molecular weight of 5.808 kDa, both identical to that of human insulin. Insulin lispro has the following primary structure: Insulin Lispro injection is a sterile, clear, and colorless solution for subcutaneous or intravenous use. Each mL of Insulin Lispro contains 100 units of insulin lispro, and the inactive ingredients: dibasic sodium phosphate (1.0 mg), glycerin (16 mg), metacresol (3.15 mg), trace amounts of phenol, zinc oxide (content adjusted to provide 0.0197 mg zinc ion), and Water for Injection, USP. Insulin Lispro has a pH of 7.0 to 7.8. Hydrochloric acid 10% and/or sodium hydroxide 10% is added to adjust the pH. Primary Structure

How to use

See Full Prescribing Information for important administration instructions. ( 2.1 , 2.2 , 2.3 , 2.4 ) Subcutaneous Injection ( 2.2 ): Administer Insulin Lispro by subcutaneous injection into the abdominal wall, thigh, upper arm, or buttocks within 15 minutes before a meal or immediately after a meal. Rotate injection sites to reduce risk of lipodystrophy and localized cutaneous amyloidosis. Continuous subcutaneous infusion (Insulin Pump) ( 2.2 ): Refer to the insulin infusion pump user manual to see if Humalog can be used. Use in accordance with the insulin pump instructions for use. Administer Insulin Lispro by continuous subcutaneous infusion using an insulin pump in a region recommended in the instructions from the pump manufacturer. Rotate infusion sites to reduce risk of lipodystrophy and localized cutaneous amyloidosis. Intravenous Infusion ( 2.2 ): Administer Insulin Lispro by intravenous infusion ONLY after dilution and under medical supervision. The dosage of Insulin Lispro must be individualized based on the route of administration and the individual's metabolic needs, blood glucose monitoring results and glycemic control goal. ( 2.3 ) Do not perform dose conversion when using the Insulin Lispro prefilled pens. The dose window shows the number of insulin units to be delivered and no conversion is needed. ( 2.1 , 2.3 ) 2.1 Important Administration Instructions Always…

Side effects

The following adverse reactions are discussed elsewhere: Hypoglycemia [see Warnings and Precautions ( 5.3 )] . Hypoglycemia Due to Medication Errors [see Warnings and Precautions ( 5.4 )]. Hypersensitivity Reactions [see Warnings and Precautions ( 5.5 )]. Hypokalemia [see Warnings and Precautions ( 5.6 )] . Adverse reactions associated with Insulin Lispro include hypoglycemia, allergic reactions, injection site reactions, lipodystrophy, pruritus, and rash. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Eli Lilly and Company at 1-800-LillyRx (1-800-545-5979) or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. 6.1 Clinical Trials Experience Because clinical trials are conducted under widely varying designs, the adverse reaction rates reported in one clinical trial may not be easily compared with those rates reported in another clinical trial, and may not reflect the rates actually observed in clinical practice. Common adverse reactions, excluding hypoglycemia, were defined as events that occurred in ≥5% of patients treated with Insulin Lispro or regular human insulin. The frequencies of adverse reactions during Insulin Lispro clinical trials in patients with type 1 diabetes mellitus and type 2 diabetes mellitus are listed in the tables below. Table 1: Adverse Reactions That Occurred in ≥5% in Patients with Type 1 Diabetes Mellitus Insulin Lispro (%) (n=81) Regular human…

Warnings

Important safety information

Never share an Insulin Lispro prefilled pen or syringe 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. Monitor blood glucose and increase monitoring frequency with changes to insulin dosage, use of glucose lowering medications, meal pattern, physical activity; in patients with renal or hepatic impairment; and in patients with hypoglycemia unawareness. ( 5.3 , 7 , 8.6 , 8.7 ) 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: May be life-threatening. Discontinue Insulin Lispro, monitor and treat if indicated. ( 5.5 ) 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 ) Hyperglycemia and Ketoacidosis Due to Insulin Pump Device Malfunction: Monitor glucose and administer Insulin Lispro by subcutaneous injection if pump malfunction occurs. ( 5.8 ) 5.1 Never Share an Insulin Lispro Prefilled Pen or Syringe Between Patients Insulin Lispro prefilled pens must never be shared between patients, even if the needle is changed. Patients using Insulin Lispro vials must never share needles or syringes with another person. 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 antidiabetic products may be needed. 5.3 Hypoglycemia Hypoglycemia is the most common adverse reaction associated with insulins, including Insulin Lispro. 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). 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 Insulin Lispro 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 )] . 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. 5.4 Hypoglycemia Due to Medication Errors Accidental mix-ups between insulin products have been reported. To avoid medication errors between Insulin Lispro 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 Insulin Lispro. If hypersensitivity reactions occur, discontinue Insulin Lispro; treat per standard of care and monitor until symptoms and signs resolve [see Adverse Reactions ( 6.1 )] . Insulin Lispro is contraindicated in patients who have had hypersensitivity reactions to Insulin Lispro or any of the excipients in Insulin Lispro [see Contraindications ( 4 )] . 5.6 Hypokalemia All insulins, including Insulin Lispro, 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 Insulin Lispro, 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. 5.8 Hyperglycemia and Ketoacidosis Due to Insulin Pump Device Malfunction Malfunction of the insulin pump or insulin infusion set or insulin degradation can rapidly lead to hyperglycemia and ketoacidosis. Prompt identification and correction of the cause of hyperglycemia or ketosis is necessary. Interim subcutaneous injections with Insulin Lispro may be required. Patients using continuous subcutaneous insulin infusion pump therapy must be trained to administer insulin by injection and have alternate insulin therapy available in case of pump failure [see How Supplied/Storage and Handling ( 16.2 ) and Patient Counseling Information ( 17 )] .

Who should not take Humalog

Insulin Lispro is contraindicated: during episodes of hypoglycemia [see Warnings and Precautions ( 5.3 )] . in patients who are hypersensitive to Insulin Lispro or to any of the excipients in Insulin Lispro [see Warnings and Precautions ( 5.5 )] . Do not use during episodes of hypoglycemia. ( 4 ) Do not use in patients with hypersensitivity to Insulin Lispro or any of the excipients in Insulin Lispro. ( 4 )

Overdose — what happens if you take too much

Excess insulin administration may cause hypoglycemia and hypokalemia. Mild episodes of hypoglycemia usually can be treated with oral glucose. Adjustments in drug dosage, meal patterns, or exercise may be needed. More severe episodes with coma, seizure, or neurologic impairment may be treated with a glucagon product for emergency use or concentrated intravenous glucose. Sustained carbohydrate intake and observation may be necessary because hypoglycemia may recur after apparent clinical recovery. Hypokalemia must be corrected appropriately.

U.S. Poison Control: call or text 1-800-222-1222 (free, 24/7). In an emergency call 911. From the FDA label; not medical advice.

Interactions

The table below includes clinically significant drug interactions with Insulin Lispro. 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 analog (e.g., octreotide), and sulfonamide antibiotics. Intervention: Dose adjustment and increased frequency of glucose monitoring may be required when Insulin Lispro is co-administered with these drugs. Drugs That May Decrease the Blood Glucose Lowering Effect of Insulin Lispro 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 adjustment and increased frequency of glucose monitoring may be required when Insulin Lispro is co-administered with these drugs. Drugs That May Increase or Decrease the Blood Glucose Lowering Effect of Insulin Lispro Drugs: Alcohol, beta-blockers, clonidine, and lithium salts. Pentamidine may cause hypoglycemia, which may sometimes be followed by hyperglycemia. Intervention: Dose adjustment and increased frequency of glucose monitoring may be required when Insulin Lispro is co-administered with these drugs. Drugs That May Blunt Signs and Symptoms of Hypoglycemia Drugs: Beta-blockers, clonidine, guanethidine and reserpine Intervention: Increased frequency of glucose monitoring may be required when Insulin Lispro is co-administered with these drugs. Drugs that may increase the risk of hypoglycemia: antidiabetic agents, ACE inhibitors, angiotensin II receptor blocking agents, disopyramide, fibrates, fluoxetine, monoamine oxidase inhibitors, pentoxifylline, pramlintide, salicylates, somatostatin analog (e.g., octreotide), and sulfonamide antibiotics ( 7 ). Drugs that may decrease the blood glucose lowering effect: atypical antipsychotics, 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 ( 7 ). Drugs that may increase or decrease the blood glucose lowering effect: alcohol, beta-blockers, clonidine, lithium salts, and pentamidine ( 7 ). Drugs that may blunt the signs and symptoms of hypoglycemia: beta-blockers, clonidine, guanethidine, and reserpine ( 7 ).

Dosage forms

Injectable

The forms currently marketed in the U.S., per the FDA National Drug Code Directory.

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Frequently asked questions

Is there a coupon or discount for Humalog?
pharmaranks is an independent ratings site, not a pharmacy — we don't issue coupons or sell Humalog. To pay less, ask your prescriber or pharmacist whether a generic equivalent exists, check the manufacturer's copay/savings card and patient-assistance program, and compare a pharmacy discount card against your insurance copay. Prices vary by pharmacy, insurance, and location, so always confirm at the counter. This is general reference, not medical or financial advice.
Who makes Humalog?
Humalog is marketed by Lilly. You can see Lilly's full profile, rating, and other products on pharmaranks.
Is Humalog a brand-name or generic drug?
Humalog is a brand-name product with the active ingredient Insulin Lispro Recombinant.
Is Humalog available over the counter?
No. Humalog is a prescription (Rx) medication in the US — you need a prescription from a licensed clinician (in person or via telehealth); it isn't sold over the counter. For some conditions there are OTC alternatives — ask your pharmacist.
What forms does Humalog come in?
Humalog is currently marketed as injectable, per the FDA's National Drug Code Directory.
Is Humalog FDA-registered?
Humalog is on record with the U.S. FDA under application number BLA020563. You can verify this on its official FDA label.
Is Humalog safe?
There's no single safe-or-not verdict, and we don't yet have a composite recall-safety score for Humalog. Review its FDA-label side effects and warnings below, and always consult a licensed professional.
What are the side effects of Humalog?
Humalog's side effects are taken directly from its FDA label. From the label: The following adverse reactions are discussed elsewhere: Hypoglycemia [see Warnings and Precautions ( 5.3 )] . Hypoglycemia Due to Medication Errors [see Warnings and Precautions ( 5.4 )]. Hypersensitivity Reactions [see Warnings and Precautions ( 5.5 )].… Both common and serious reactions are documented in full on this page. This is general reference from the FDA, not medical advice — always consult a professional.

Clinical content sourced from the FDA label via openFDA (U.S. FDA). View the FDA label on DailyMed → Provided for general reference only — not medical advice. Always consult a licensed professional and the current prescribing information.

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