Approved for medical use in 2000, Insulin aspart is a short-acting, manmade version of human insulin. It works by replacing the insulin that is normally produced by the body and by helping move sugar from the blood into other body tissues where it is used for energy. Besides, Insulin aspart also stops the liver from producing more sugar. Bear in mind that Insulin Aspart is usually given immediately or 15 minutes before a meal as an injection into the fatty tissue under the skin. However, you also need to eat after injecting it. Remember to use the injection technique as advised by your doctor or nurse and as described in the manual. Also ensure that your insulin appears clear and colorless before use, because you must not use Insulin aspart if it appears cloudy, grainy or if particles are seen in the vial. As for the side effects, they include low blood sugar, allergic reactions, itchiness, and pain at the site of injection. In addition, Insulin aspart has serious side effects such as low blood potassium. Bear in mind that the use of Insulin Aspart during pregnancy and breastfeeding is generally safe.