Over the past years, drug companies have developed various ways to deliver insulin into the bloodstream. The two most popular and most commonly used ways are the syringe and insulin pen.
1. Syringe
Insulin syringes come in short and long needles. The length of the needle affects the amount of time that insulin takes effect. Longer needles offer more depth and this causes the insulin to take effect more quickly. A syringe has three parts: a needle, a barrel, and a plunger. The barrel is marked with lines to measure the number of insulin units.
2. Insulin Pen
The insulin pen…





