What is Humulin® R U-100?
Short-acting insulin to cover blood sugar increases from meals eaten within 30 minutes
Humulin R U-100 is a short-acting insulin, which means it can cover insulin needs for meals eaten within 30 minutes.
There are 2 types of Humulin R insulin: Humulin R U-100 and a more concentrated insulin, Humulin R U-500. U-100 insulins, including Humulin R, contain 100 units per mL. It’s important to make sure you have the correct one.
Humulin R U-100 is for injection under the skin. It should not be injected into the muscle. Doses of insulin are measured in units. With Humulin R U-100, it is important to use a syringe that is marked for U-100 insulins.
Do not use Humulin R U-100:
- If it appears cloudy, thickened, or slightly colored, or
- If solid particles are visible
If you notice your insulin requirements changing, talk to your doctor.
Be sure to read the Patient Information that comes with your Humulin R U-100 insulin.
Also be sure to read the Instructions for Use for your Humulin R U-100 vial.
To learn more about Humulin R U-100, call The Lilly Answers Center at 1-800-LillyRx (1-800-545-5979).
Pens and needles are for single-patient use only and should not be shared, even in healthcare facilities, as infection or disease can be spread from one person to another.
Do not withdraw insulin from the pen using a syringe.