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What is Insulin Degludec and Liraglutide: Uses, Dosage, Side Effects and More
What is Insulin Degludec and Liraglutide: Uses, Dosage, Side Effects and More

Health Library

What is Insulin Degludec and Liraglutide: Uses, Dosage, Side Effects and More

October 10, 2025


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Insulin degludec and liraglutide is a combination medication that helps manage blood sugar levels in people with type 2 diabetes. This injectable medication combines two powerful diabetes treatments in one convenient shot. The combination works by providing long-lasting insulin coverage while also helping your body produce more of its own insulin when blood sugar rises.

What is Insulin Degludec and Liraglutide?

This medication is a fixed-dose combination of two diabetes medicines that work together to control blood sugar. Insulin degludec is a long-acting insulin that provides steady glucose control for up to 24 hours, while liraglutide is a GLP-1 receptor agonist that helps your pancreas release insulin when you eat.

The combination comes as a pre-filled injection pen that you use once daily. It's specifically designed for adults with type 2 diabetes who need both insulin and additional blood sugar support. This dual-action approach can be more effective than using either medication alone.

Your doctor might prescribe this combination when other diabetes medications haven't provided adequate blood sugar control. It's particularly helpful for people who struggle with both fasting blood sugar levels and post-meal spikes.

What is Insulin Degludec and Liraglutide Used For?

This medication treats type 2 diabetes in adults who need better blood sugar control than diet and exercise alone can provide. It's typically prescribed when single diabetes medications haven't been effective enough or when you need the benefits of both insulin and GLP-1 therapy.

The combination is especially useful for people who have difficulty managing both their baseline blood sugar and their blood sugar spikes after meals. Many patients find it helps them achieve their target blood sugar levels more effectively than taking separate medications.

Your healthcare provider might recommend this treatment if you're already taking insulin or other diabetes medications but still struggling with elevated A1C levels. It can also help if you're experiencing frequent blood sugar fluctuations throughout the day.

How Does Insulin Degludec and Liraglutide Work?

This combination medication works through two different but complementary mechanisms to control your blood sugar. The insulin degludec component acts as a long-acting insulin that provides steady glucose control throughout the day and night, similar to how your pancreas would naturally release insulin.

The liraglutide component works by mimicking a hormone called GLP-1 that your intestines naturally produce after eating. This helps your pancreas release more insulin when your blood sugar rises and also slows down how quickly food leaves your stomach, which helps prevent blood sugar spikes.

Together, these two medications provide both baseline insulin coverage and meal-related blood sugar control. This dual approach can be more effective than using either medication alone, often resulting in better overall blood sugar management with fewer daily injections.

How Should I Take Insulin Degludec and Liraglutide?

You'll inject this medication once daily under your skin, typically in your thigh, upper arm, or abdomen. It's best to take it at the same time each day to maintain consistent blood sugar control. You can take it with or without food, though many people find it easier to remember when they link it to a daily routine like breakfast.

Your doctor will start you on a specific dose and may adjust it based on your blood sugar readings and how well you're responding to the medication. Always follow your healthcare provider's instructions exactly, as diabetes medications need to be carefully tailored to your individual needs.

Before injecting, let the medication come to room temperature if it's been stored in the refrigerator. Rotate your injection sites to prevent skin problems, and never share your injection pen with others. If you're unsure about proper injection technique, ask your healthcare team to demonstrate.

How Long Should I Take Insulin Degludec and Liraglutide For?

This medication is typically used as a long-term treatment for type 2 diabetes, often for many years or even lifelong. Diabetes is a chronic condition that requires ongoing management, and this combination can be an important part of your treatment plan for as long as it continues to be effective and well-tolerated.

Your doctor will regularly monitor your blood sugar levels, A1C results, and overall health to determine if this medication continues to be the right choice for you. Some people may need dose adjustments over time, while others might eventually switch to different diabetes medications based on how their condition progresses.

Never stop taking this medication suddenly without talking to your healthcare provider first. Stopping diabetes medications abruptly can lead to dangerous blood sugar spikes and potentially serious complications.

What Are the Side Effects of Insulin Degludec and Liraglutide?

Like all medications, this combination can cause side effects, though not everyone experiences them. The most common side effects are generally mild and often improve as your body adjusts to the medication over the first few weeks of treatment.

Here are the most frequently reported side effects you might experience:

  • Nausea, especially during the first few weeks
  • Diarrhea or stomach upset
  • Decreased appetite
  • Injection site reactions like redness or swelling
  • Headache
  • Low blood sugar (hypoglycemia), especially if you skip meals

These common side effects usually become less bothersome as your body gets used to the medication. Taking the injection with food can help reduce nausea for some people.

More serious side effects are less common but require immediate medical attention. These rare but important side effects include:

  • Severe low blood sugar with symptoms like confusion, sweating, or shakiness
  • Signs of pancreatitis such as severe stomach pain that doesn't go away
  • Thyroid tumors (very rare, but important to monitor)
  • Severe allergic reactions with difficulty breathing or swelling
  • Kidney problems, especially if you become dehydrated

If you experience any severe side effects, contact your healthcare provider immediately. Most people tolerate this medication well, but it's important to stay aware of how you're feeling and report any concerning symptoms.

Who Should Not Take Insulin Degludec and Liraglutide?

This medication isn't suitable for everyone, and certain health conditions or circumstances make it unsafe to use. People with type 1 diabetes should not use this combination, as it's specifically designed for type 2 diabetes management.

You should not take this medication if you have a personal or family history of medullary thyroid carcinoma or Multiple Endocrine Neoplasia syndrome type 2. These are rare conditions, but the liraglutide component can potentially worsen them.

Other important situations where this medication may not be appropriate include:

  • Pregnancy or breastfeeding (insulin needs change significantly during these times)
  • Severe kidney disease or kidney failure
  • History of pancreatitis
  • Severe stomach problems that delay food digestion
  • Known allergy to insulin degludec, liraglutide, or any ingredients in the medication

Your doctor will carefully review your medical history and current health status before prescribing this medication. Be sure to tell them about all your health conditions and medications to ensure this treatment is safe for you.

Insulin Degludec and Liraglutide Brand Names

This combination medication is available under the brand name Xultophy 100/3.6 in the United States. The numbers refer to the concentration of each component in the injection pen.

Some insurance plans may have specific requirements or preferred alternatives, so it's worth checking with your insurance provider about coverage. Your pharmacist can also help you understand any insurance considerations or patient assistance programs that might be available.

Insulin Degludec and Liraglutide Alternatives

Several other treatment options exist for people with type 2 diabetes who need combination therapy. Your doctor might consider other insulin and GLP-1 receptor agonist combinations, or separate medications taken together.

Alternative approaches might include taking long-acting insulin separately along with other diabetes medications like metformin, SGLT2 inhibitors, or other GLP-1 receptor agonists. Some people do well with different insulin types or oral diabetes medications depending on their individual needs.

The best alternative depends on your specific blood sugar patterns, lifestyle, other health conditions, and how well you tolerate different medications. Your healthcare provider can help determine what might work best if this combination isn't suitable for you.

Is Insulin Degludec and Liraglutide Better Than Other Diabetes Medications?

This combination can be more effective than many other diabetes treatments for people who need both long-acting insulin and GLP-1 therapy. Studies show that combination therapy often provides better blood sugar control than either medication used alone.

The main advantage is convenience - getting both medications in one daily injection rather than multiple shots. Many people also experience better overall blood sugar control with fewer fluctuations throughout the day.

However, "better" depends on your individual situation. Some people do very well with other diabetes medications or different combinations. Your doctor will consider your blood sugar patterns, lifestyle, other health conditions, and treatment goals when determining the best approach for you.

Frequently asked questions about Insulin degludec and liraglutide (subcutaneous route)

This medication can actually be beneficial for people with heart disease, as the liraglutide component has been shown to provide cardiovascular benefits in some studies. However, you should always discuss your heart condition with your doctor before starting any new diabetes medication.

Your healthcare provider will carefully weigh the benefits and risks based on your specific heart condition and overall health. They may want to monitor you more closely when you first start the medication.

If you accidentally inject more than your prescribed dose, monitor your blood sugar closely and watch for signs of low blood sugar like shakiness, sweating, confusion, or rapid heartbeat. Have some fast-acting carbohydrates like glucose tablets or fruit juice readily available.

Contact your healthcare provider immediately to let them know about the overdose. They may recommend checking your blood sugar more frequently for the next 24 hours and provide specific instructions based on how much extra medication you took.

If you miss your daily dose, take it as soon as you remember, as long as there are at least 8 hours before your next scheduled dose. If it's almost time for your next dose, skip the missed dose and continue with your regular schedule.

Never take two doses at the same time to make up for a missed dose, as this can cause dangerous low blood sugar. If you frequently forget doses, consider setting a daily alarm or using a pill reminder app to help you stay on track.

You should only stop taking this medication under your doctor's supervision. Type 2 diabetes is a chronic condition that typically requires ongoing treatment, and stopping diabetes medications suddenly can lead to dangerous blood sugar spikes.

Your doctor may decide to change your medication if you experience side effects, if your diabetes improves significantly with lifestyle changes, or if a different treatment approach becomes more appropriate for your situation. Any changes to your diabetes treatment should always be made gradually and with medical supervision.

Yes, you can travel with this medication, but it requires some planning. Keep the medication in its original packaging and bring a prescription or letter from your doctor, especially for air travel. Never put insulin in checked luggage, as temperature extremes can damage it.

Bring extra medication in case of delays, and consider how time zone changes might affect your dosing schedule. Your healthcare provider can help you plan for longer trips or significant time zone changes to ensure you maintain good blood sugar control while traveling.

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