Insulin is grouped according to how long it works in the body. The five different types of insulin range from rapid- to long-acting. Some types of insulin look clear, while others are cloudy. Check with your pharmacist whether the insulin you are taking should be clear or cloudy.

Are all insulins the same?

Insulin is made by different companies. Make sure you use the same type of insulin consistently. Rapid-acting insulins work over a narrow, more predictable range of time. Because they work quickly, they are used most often at the start of a meal.

Which insulin is best for high blood sugar?

Long, ultra-long or intermediate-acting insulin helps the body use this glucose and keeps glucose levels from rising too high. Examples of these insulins are glargine (Lantus, Toujeo, others), detemir (Levemir), degludec (Tresiba) and NPH (Humulin N, Novolin N, Novolin ReliOn Insulin N).