Novolin GE 50/50 Penfill Cartridges are premixed insulin that combines intermediate-acting insulin (insulin NPH) with fast-acting insulin (insulin regular). Patients find using the ratio with this premixed insulin to work best for them.
Novolin GE 50/50 comes in a penfill cartridge. Each mL contains 100 units (50 units of insulin isophane, human biosynthetic – NPH insulin, and 50 units of regular insulin). Other non-medical ingredients in Novolin GE 50/50 include metacresol, phenol, protamine sulfate, sodium hydroxide, hydrochloric acid, zinc chloride, glycerol, disodium phosphate dihydrate, and water for injection.
This premixed insulin starts working 30-60 minutes after injection, has a maximum effect between 2-8 hours, and lasts up to 18 hours.
A physician may have prescribed this medication for reasons not discussed here. If you are unsure why you have been prescribed this medication, consult with your doctor. Do not stop taking your medicine unless instructed by your doctor.
Insulin medication should not be shared with anyone else, even if they share similar symptoms. This medication can be harmful to those who have not received a prescription from their doctor.
The insulin should appear cloudy and white. Do not use if you notice the contents of the vial remain clear after you roll the suspension in your hands, seems to be discolored, is unusually thick, looks grainy or lumpy, sticks to the vial, seems unusually thick, contains crystals, or if the bottle looks frosted.
Novolin also comes in 40/60 cartridges, 30/70 cartridges and NPH cartridges and vials. Ensure you are ordering the correct mixture, as it can be easy to confuse Novolin products amongst each other.