Injection pen is a popular method of drug delivery. This is now replacing the normal syringe usage with large amount of medications obtainable while in the form of pre-filled disposable cartridges. These pens are extensively utilised for injecting insulin and therefore are highly-priced. Also, they eliminate the stage of drawing insulin through the vial, that's an important advantage they provide. That is particularly beneficial for teenagers who suffer from diabetic issues and dread syringes. It resembles an actual pen in its structure, just that it is more substantial than that. It is made up of a dial, a cartridge, as well as a very small needle. Independent disposal pen needles will also be needed for these pens. These needles will also be available in numerous thickness and duration much like a traditional syringe needle.