Short Acting Insulin
The most common form of insulin is short acting insulin. This is the insulin that is taken just before meals. If you have insulin aspart, insulin glulisine, or insulin lispro then you have short acting insulin. If you’re not sure what type of insulin you have, look for brand names such as Humulin R or Novolin R.
Short acting insulin is the best formulation for proper meal digestion. This insulin begins working after 30 minutes to one hour, so make sure to take it before eating. Ideally, take your insulin 30 minutes before eating. This means that you may be taking this insulin up to 3 times per day, once with each meal. Now, you should not skip meals if you have diabetes, but if you do, you should also skip your dose of insulin. Taking your insulin without a meal may lower your blood sugar to dangerous levels.