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There are two types of basal insulin people with diabetes could take:
- Intermediate-acting insulin (NPH) takes 2 to 4 hours to reach the blood. It works hardest from 4 to 10 hours after your shot and lasts 10 to 16 hours.
- Long-acting insulin (Detemir or Glargine) starts working several hours after your shot. It stays in your blood for 20 to 24 hours.
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