The final volume will be larger than the amount of fluid you add because the powder will take up some room when diluted. If you are not given a final volume calculate the concentration based on the amount of fluid you added. You will calculate the amount to administer from the final concentration. Insulin Insulin is administered only using an insulin syringe. Regular insulin is the only type that may be given IV since it does not contain any additives to prolong the action.
Regular insulin is clear.
If the vial is cloudy, it has been contaminated and should be discarded. Longer acting insulins are cloudy and may have a precipitate on the bottom of the vial. Be sure to mix the vial well by rotating it between the hands. Mixing regular insulin and a longer acting insulin in the same syringe. Inject air into the longer acting insulin vial first - don't let the tip of the needle touch the surface of the fluid.