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What is Short Acting Insulin?

Short Acting Insulin

Short acting Insulin injection is primarily used to treat diabetes among children and adults. It uses human-made insulin to lower blood sugar and manage blood sugar levels. Although it does not entirely cure the disease, it is a huge help for patients suffering from type 1 and type 2 diabetes.

How does it work? Here is a list of how this type of medicine can help you with your treatment:

  • Lowers blood sugar levels.
  • Transports glucose from your blood into cells for energy use.
  • Prevents the liver from overproducing sugar.

Insulin is a hormone that helps your body convert sugar into energy. Diabetic people either produce too little insulin or their bodies can’t use insulin efficiently. Hence, doctors prescribe human-made insulin to control blood sugar levels and prevent further complications from diabetes.


Is Regular Insulin Short-acting?

Yes, short-acting insulin is also called regular insulin. Additionally, it also covers your insulin needs at mealtime. Compared to rapid-acting insulin, it can be injected a little before a meal.


Short-acting Insulin Peak

Short-acting insulin takes about 30 to 60 minutes to become active in your bloodstream. It peaks in 2 to 3 hours. You can experience its effects for 3 to 6 hours upon injection.


Brand Names?

Short-acting insulin is available under various brand names:

  • Humulin R comes as a liquid solution. It is a brand-name medication available by prescription. It is used to help manage blood sugar levels in adults and children with either type 1 or type 2 diabetes. Humulin R is available in two dosages: Humulin R U-100 and Humulin R U-500.
  • Novolin R is a type of insulin prescribed by doctors to help control blood sugar for many hours during the day. But, it may sometimes take time to find the correct dose that works best for you. This medication is available over the counter, even without a prescription.

Side Effects

  • Bumps and swelling or itching at the injection site
  • Muscle pain
  • Weight gain


Other serious side effects also include:

  • Difficulty breathing
  • Wheezing
  • Fast heart rate
  • Heart failure
  • Hyperglycemia
  • Severe allergic reactions


If your healthcare provider has prescribed short-acting insulin, it is important not to change your dose or stop taking this medication without prior consultation. If symptoms persist, go to your nearest healthcare provider for consultation.

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