Table of Contents
What Is Long-Acting Insulin?
Long-acting insulin is a type of insulin that keeps the level of insulin in the body steady for a long time. It takes a while to start working after you get the shot, but it keeps your blood sugar in check for about 24 hours or longer. Unlike fast- or short-acting insulin, it does not cause a sharp peak. Instead, it keeps its effect pretty steady all day. This steady action is why it is often called basal or background insulin. People with type 1 or type 2 diabetes often use long-acting insulin to help keep their blood sugar levels stable between meals and overnight. They usually take it once or twice a day.
What Are the Types of Long-Acting Insulin Analogs?
The most common long-acting insulin analogs include:
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Glargine insulin (100 U/mL) is a popular long-acting insulin that consistently controls blood sugar levels for up to 24 hours.
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Insulin Detemir is another long-acting alternative that provides steady insulin coverage and binds to albumin in the blood.
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For those who need greater dosages, Glargine Insulin (300 U/mL) is a concentrated form of Glargine with an exceptionally long half-life.
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Degludec Insulin is well-known for its exceptionally extended half-life (more than 24 hours) and adjustable dosage, which makes it perfect for patients with erratic schedules.
How Does Each Long-Acting Insulin Work?
Each long-acting insulin works in the following ways:
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Detemir: This type works for about 18 to 24 hours and is injected once or twice daily at the same time every day.
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Glargine: Injection Glargine forms clusters in the fatty tissue underneath the skin. These clusters disintegrate gradually and slowly release small quantities of insulin into the bloodstream. Its duration of action is up to 24 hours. This long-acting insulin is taken once daily at the same time every day.
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Degludec: This type acts by retarding the rate of absorption of insulin molecules in the bloodstream. Its duration of action is up to 42 hours and should be taken once daily. However, this long-acting insulin does not need to be taken at the same time every day.
What Are the Side Effects of Long-Acting Insulin?
Although long-acting insulin is usually well tolerated, the following are some possible adverse effects:
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Hypoglycemia: Low blood sugar, particularly when insulin is taken in excess or when meals are omitted.
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Injection Site Reactions: Injection site discomfort, edema, or redness.
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Weight Gain: One common adverse effect of insulin therapy is increased body weight. Rare but probable allergic reactions can range in severity from mild to severe.
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Edema: Swelling due to fluid retention, especially in the hands and feet.
How Should Long-Acting Insulin Be Delivered?
Long-acting insulins may be administered once or twice, depending on individual needs. It is taken subcutaneously using an insulin pen, syringe, or pump. It is vital to ensure the right techniques and the appropriate dose and frequency for the best control of blood sugar levels. However, to avoid tissue damage, rotation of injection sites is recommended in addition to following a healthcare professional's guidelines.
Taking long-acting insulin as a pill does not work because the stomach breaks it down while it digests. So, people with diabetes should get insulin shots in the fatty tissue under their skin. The insulin will then slowly move into the bloodstream. There are a few different places and ways to safely inject insulin into the body.
The National Institute of Diabetes and Digestive and Kidney Diseases says that long-acting insulin can be given in the following ways:
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Pump: This method uses a catheter and an electronic unit to give timed doses of rapid-acting insulin, so you do not have to get regular shots.
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Pen: A pen with a cartridge full of insulin can send a premeasured dose of insulin. There are also disposable pens that come with prefilled levels of insulin.
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Needle and Syringe: This method uses a syringe to take a dose of insulin from a vial and then injects it into different parts of the body. You shouldn't mix different kinds of insulin in the same syringe.
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Injection Port: A short tube in an injection port goes into the tissue under the skin. The person can give themselves insulin through this port.
How Can Type 1 Diabetes Be Helped by These Insulin Analogs?
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Constant Basal Insulin: To control blood glucose during fasting or between meals, long-acting insulin analogs like Degludec or Glargine help maintain a steady baseline insulin level. They stimulate the body's normal insulin production and maintain constant blood glucose levels day and night.
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Decrease in Hypoglycemia: Long-acting insulins lower the chance of blood sugar falling too low, especially overnight or during fasting periods, thanks to their consistent action profiles and absence of noticeable insulin peak times.
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Flexible Dosing: Degludec, one of the long-acting insulin products, offers ultra-long duration and flexibility in the timing of injections. This means that, although it is recommended to inject this at the same time each day, it will tolerate fluctuations of up to eight hours without affecting blood sugar levels significantly. Moreover, this insulin has a low risk of hypoglycemia, especially nocturnal hypoglycemia, and is therefore the best option for diabetic patients who need basal insulin injections.
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Better Glycemic Control: The combination of fast-acting insulin for the control of glucose levels during meals and long-acting insulin for basal needs helps prevent fluctuations in blood sugar levels. This is the only approach that will completely eliminate the possibility of health issues such as cardiovascular disease, kidney problems, and eye problems.
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Peak Insulin Times and Consistent Insulin Control: Unlike conventional insulin, long-acting insulins have few or no peaks with distinct peak timings (about two to four hours after injection).
How Should One Store Insulin and Supplies Appropriately?
The following measures should be taken:
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You should keep insulin pens and bottles in the fridge at a temperature between 36 and 46 degrees Fahrenheit until you open them.
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You should not use it after the date mentioned on the package.
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According to the manufacturer's instructions, insulin that has not been used for a long time should be discarded.
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It should be kept at room temperature (no higher than 86 degrees Fahrenheit) or in the fridge when not in use.
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To make sure the insulin works right, it should be kept safe from very high or very low temperatures.
Conclusion
Long-acting insulin is meant to work slowly and stay in the body for a long time. It does not usually have a strong peak like some other insulins, so its effect stays pretty steady all day. Depending on the plan for treatment, it could be taken once or twice a day. Doctors often give it to people with type 1 and type 2 diabetes to help keep their body's insulin levels stable. A healthcare specialist will assist you in selecting the right kind of insulin and the right schedule of dosing. To get more personal advice, you can consult a diabetes specialist.
Key Takeaways
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Long-acting insulin analogs are used to treat both type 1 and type 2 diabetes, not just type 1 diabetes.
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Basal or background insulin is needed to keep blood sugar levels stable during times of fasting, like overnight or between meals.
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It is important to check your blood sugar levels regularly so you can change your dose and keep your diabetes under control.
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Long-acting insulin analogs are part of a personalized diabetes treatment plan that takes into account the patient's health and lifestyle, as well as the lifestyle changes needed if they have type 1 diabetes mellitus.

