Insulin Pens

Are common in the United Kingdom, and are generally characterised by a different shape and the fact that they use an insulin cartridge as opposed to a vial.Some insulin pens use replaceable cartridges, and others use non-replaceable cartridges and must be disposed of after being used.Most insulin pens use replaceable, which have become extremely short and thin.The replaceable cartridges for insulin pens come in 3 and 1 ½ ml sizes, although 3 is more common and has become dominant. Prefilled insulin pens are disposed of when the insulin within the cartridge is used up. Prefilled pens are often marketed for type 2 diabetics who need to use insulin.