Basalog is a long-acting insulin (insulin glargine) that comes in cartridge form and is meant to be used only with a compatible reusable insulin pen device. Insupen Pro is a type of insulin pen needle, not an insulin pen. It is used for injecting insulin, but it does not hold or deliver insulin on its own. Because of this, a Basalog cartridge cannot be fitted directly into Insupen Pro. If you are using Basalog, you will need a proper reusable insulin pen that is designed to hold insulin cartridges, and then Insupen Pro needles can be attached to that pen for injection. The exact pen device must match the cartridge type and should be recommended by your doctor or pharmacist to ensure safe use. Since you have had diabetes for many years and your sugar levels are still not well controlled, it is very important to review your treatment plan with your doctor. You may need changes in insulin type, dose, timing, or additional medicines along with lifestyle adjustments. Avoid mixing devices or using them incorrectly, as this can lead to wrong dosing and unsafe blood sugar levels.