An insulin pen used for subcutaneous injection is called a Humalog KwikPen 100UI. It is a rapid-acting insulin analogue used to lower blood sugar levels in people with both type 1 and type 2 diabetes. The insulin lispro in the pen mimics the properties of naturally occurring insulin in the body, making it easier for cells to absorb glucose. https://yourmuscleshop.to/product/humalog-mix50-1-insulin-pen-kwikpen-100iu-lilly-with-pen-needles/