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Insulin Lispro Side Effects

Medically reviewed by Philip Thornton, DipPharm. Last updated on Dec 5, 2024.

Applies to insulin lispro: solution.

Precautions

It is very important that your doctor check your progress at regular visits especially during the first few weeks you use this medicine. Blood and urine tests may be needed to check for unwanted effects.

Never share insulin pens or cartridges with others under any circumstances. It is not safe for one pen to be used for more than one person. Sharing needles or pens can result in transmission of hepatitis viruses, HIV, or other bloodborne illnesses.

It is very important to follow carefully any instructions from your health care team about:

In case of emergency—There may be a time when you need emergency help for a problem caused by your diabetes. You need to be prepared for these emergencies. It is a good idea to:

This medicine may cause serious allergic reactions, including anaphylaxis, which can be life-threatening and require immediate medical attention. Call your doctor right away if you have a rash, itching, trouble breathing, trouble swallowing, or any swelling of your hands, face, or mouth while you are using this medicine.

Too much insulin lispro-aabc can cause hypoglycemia (low blood sugar). Low blood sugar can also occur if you use insulin lispro-aabc with another antidiabetic medicine, changes in insulin regimen (eg, insulin strength, type of insulin, injection site), delay or miss a meal or snack, exercise more than usual, drink alcohol, or cannot eat because of nausea or vomiting or have diarrhea. Symptoms of low blood sugar must be treated before they lead to unconsciousness (passing out). Different people may feel different symptoms of low blood sugar. It is important that you learn which symptoms of low blood sugar you usually have so that you can treat it quickly.

Symptoms of low blood sugar include anxiety, behavior change similar to being drunk, blurred vision, cold sweats, confusion, depression, difficulty in thinking, dizziness or lightheadedness, drowsiness, excessive hunger, fast heartbeat, headache, irritability or abnormal behavior, nervousness, nightmares, restless sleep, shakiness, slurred speech, and tingling in the hands, feet, lips, or tongue.

If symptoms of low blood sugar occur, eat glucose tablets or gel, corn syrup, honey, or sugar cubes, or drink fruit juice, non-diet soft drink, or sugar dissolved in water to relieve the symptoms. Also, check your blood for low blood sugar. Get to a doctor or a hospital right away if the symptoms do not improve. Someone should call for emergency help immediately if severe symptoms such as convulsions (seizures) or unconsciousness occur. Have a glucagon kit available, along with a syringe and needle, and know how to use it. Members of your household should also know how to use it.

Hyperglycemia (high blood sugar) may occur if you do not take enough or skip a dose of your antidiabetic medicine or insulin, changes in insulin regimen, you overeat or do not follow your meal plan, have a fever or infection, or do not exercise as much as usual.

Symptoms of high blood sugar include blurred vision, drowsiness, dry mouth, flushed, dry skin, fruit-like breath odor, increased urination, ketones in the urine, loss of appetite, stomachache, nausea or vomiting, tiredness, trouble breathing (rapid and deep), unconsciousness, and unusual thirst.

If symptoms of high blood sugar occur, check your blood sugar level and then call your doctor for instructions.

This medicine may make you dizzy or drowsy. Do not drive or do anything else that could be dangerous until you know how this medicine affects you.

This medicine may cause low levels of potassium in your blood. Do not use medicines, supplements, or salt substitutes that contain potassium unless you have discussed this with your doctor.

Ketoacidosis (high ketones and acid in the blood) may occur while you are using this medicine. This can be life-threatening and requires immediate medical attention. Your doctor may give you insulin, fluid, and carbohydrate replacement to treat this condition. Tell your doctor right away if you have nausea, vomiting, trouble breathing, increased thirst or urination.

Using this medicine together with other diabetes medicine (eg, thiazolidinedione [TZD] medicine) may cause serious heart problems or edema (fluid retention). Check with your doctor immediately if you are rapidly gaining weight, having chest pain or discomfort, extreme tiredness or weakness, trouble breathing, uneven heartbeat, or excessive swelling of the hands, wrist, ankles, or feet.

Serious side effects of insulin lispro

Along with its needed effects, insulin lispro may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur while taking insulin lispro:

More common side effects

  • anxiety
  • blurred vision
  • body aches or pain
  • chills
  • cold sweat
  • confusion
  • cool, pale skin
  • cough
  • depression
  • difficulty breathing
  • dizziness
  • ear congestion
  • fast heartbeat
  • fever
  • headache
  • increased hunger
  • loss of consciousness
  • loss of voice
  • muscle aches
  • nausea
  • nervousness
  • nightmares
  • runny or stuffy nose
  • seizures
  • shakiness
  • slurred speech
  • sneezing
  • sore throat
  • unusual tiredness or weakness

Rare side effects

  • bloating or swelling of the face, arms, hands, lower legs, or feet
  • chest tightness
  • difficulty swallowing
  • dizziness, fainting, or lightheadedness when getting up suddenly from a lying or sitting position
  • fast, weak pulse
  • hives, itching, skin rash
  • hoarseness
  • irritation
  • joint pain, stiffness, or swelling
  • large, hive-like swelling on the face, eyelids, lips, tongue, throat, hands, legs, feet, or genitals
  • noisy breathing
  • puffiness or swelling of the eyelids or around the eyes, face, lips, or tongue
  • redistribution or accumulation of body fat
  • redness of the skin
  • sweating
  • thickening of the skin at the injection site
  • tingling of the hands or feet
  • unusual weight gain or loss

Incidence not known

  • decreased urine
  • dry mouth
  • irregular heartbeat
  • increased thirst
  • loss of appetite
  • mood changes
  • muscle pain or cramps
  • numbness or tingling in the hands, feet, or lips
  • reddish brown itchy, thick, and scaly patches with small bumps at the injection site
  • vomiting

Other side effects of insulin lispro

Some side effects of insulin lispro may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects.

Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

Less common side effects

  • redness, swelling, bruising, rash, or itching at the injection site

For healthcare professionals

Applies to insulin lispro: injectable solution, subcutaneous solution.

General adverse events

Adverse reactions observed have included hypoglycemia, allergic reactions, local injection site reactions, lipodystrophy, rash, and pruritus.[Ref]

Metabolic

Weight gain has been reported with insulin therapy and has been attributed to the anabolic effects of insulin and the decrease in glucosuria.[Ref]

Hypersensitivity

Hypersensitivity side effects have included both local and systemic reactions. Anaphylaxis has been reported. Local reactions have presented as erythema, local edema, and pruritus at the injection site. Most minor reactions to insulin at the injection site resolve in a few days to a few weeks.

Generalized allergy to insulin may present as a whole body rash, dyspnea, wheezing, hypotension, tachycardia, or diaphoresis. In clinical trials, pruritus (with or without rash) was seen in 17 patients receiving human insulin (n=2969) and 30 patients receiving insulin lispro (n=2944).[Ref]

Local

Ocular

Rapid improvement in glucose control has been associated with a transitory, reversible ophthalmologic refraction disorder and worsening of diabetic retinopathy. However, long-term glycemic control decreases the risk of diabetic retinopathy.[Ref]

Nervous system

Rapid improvement in glucose control has been associated with a transitory, reversible acute painful peripheral neuropathy. However, long-term glycemic control decreases the risk.[Ref]

Immunologic

The clinical significance of the development of these antibody titers is unknown.[Ref]

Cardiovascular

Insulin may cause sodium retention and edema, especially as metabolic control is improving.[Ref]

Dermatologic

Long-term use of insulin may cause lipodystrophy at the site of repeated injection. Lipodystrophy includes lipohypertrophy, a thickening of adipose tissue, and lipoatrophy, thinning of adipose tissue.[Ref]

Gastrointestinal

Genitourinary

Musculoskeletal

Other

Respiratory

See also:

References

1. (2002) "Product Information. Humalog (insulin lispro)." Lilly, Eli and Company

2. Cerner Multum, Inc. "UK Summary of Product Characteristics."

Frequently asked questions

Further information

Insulin lispro side effects can vary depending on the individual. Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Note: Medication side effects may be underreported. If you are experiencing side effects that are not listed, submit a report to the FDA by following this guide.