Classification of insulin
Insulin is classified based on how fast it works, how long it takes to reach its maximum strength (peak time), and how long it lasts in your body (duration). Here are the main types of insulin:
Rapid-acting Insulin: It starts working within 15 minutes, reaches its peak in 1 hour, and lasts for 2 to 4 hours. It’s usually taken right before a meal.
Rapid-acting Inhaled Insulin: This type starts working within 10 to 15 minutes, reaches its peak in 30 minutes, and lasts for about 3 hours. It’s also usually taken right before a meal
Regular/Short-acting Insulin: It starts working within 30 minutes, reaches its peak in 2 to 3 hours, and lasts for about 3 to 6 hours. It’s usually taken 30 to 60 minutes before a meal.
Intermediate-acting Insulin: This type starts working within 2 to 4 hours, reaches its peak in 4 to 12 hours, and lasts for about 12 to 18 hours. It covers insulin needs for half a day or overnight and is often used with rapid- or short-acting insulin.
Long-acting Insulin: It starts working within 2 hours, does not peak, and lasts up to 24 hours. It covers insulin needs for about a full day and is often used with rapid- or short-acting insulin when needed
Ultra-long acting Insulin: This type starts working within 6 hours, does not peak, and lasts for about 36 hours or longer.
Premixed Insulin: This combines intermediate- and short-acting insulin and is usually taken 10 to 30 minutes before breakfast and dinner.
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