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NPH Insulin

Drug Interactions With NPH Insulin

NPH insulin can potentially interact with a number of other medicines (see Drug Interactions With NPH Insulin).

What If I Take an Overdose?

People who take too much of any type of insulin may experience symptoms such as:
  • Low blood sugar levels (hypoglycemia)
  • Fainting
  • Shakiness
  • A fast heartbeat (tachycardia)
  • Confusion
  • Sweating
  • Seizures
  • Coma
  • Loss of life.
If you happen to take too much NPH insulin, seek immediate medical attention.
(Click Novolin N Overdose or Humulin N Overdose for more information.)

Storage Methods for NPH Insulin

The recommended storage for each of the NPH insulin brands and products may vary. In general, unopened NPH insulin vials or pen devices should be stored in the refrigerator. Vials can be kept at room temperature or in the refrigerator once opened. Prefilled injection devices must be stored at room temperature once they have been used.
NPH insulin can be used only for a specific time after it is opened (this varies depending on the particular product). Check the patient information that comes with your insulin (or ask your healthcare provider) for more specific information.
Keep all forms of this insulin away from direct light or heat. Make sure to keep it out of reach of children.

Who Makes NPH Insulin?

The Humulin N brand of NPH insulin is made by Eli Lilly and Company, while Novolin N is made by Novo Nordisk.
Healthy Eating for People With Diabetes

NPH Insulin Information

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