Short Acting Insulin (Old)
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Summary
Short-acting insulin formulations include regular insulin. As a short acting insulin, regular insulin works slower than rapid-acting insulins but faster than intermediate acting insulins, with a peak around 2 hours after subcutaneous administration. Importantly, regular insulin is special because it is the only type of insulin that can be given through an IV line. Regular insulin has a clear appearance, and when mixed in a syringe with intermediate-acting insulins, the regular insulin should be drawn up in the syringe first.
Key Points
- Short Acting Insulin
- Drug Names
- Regular Insulin (Humulin R, Novolin R)
- Onset, Peak, Duration
- Onset = 30 minutes - 1 hour
- Peak = ~2 hours
- Exact peak depends on patient and ranges from 2-5 hours
- Duration = 5-8 hours
- Nursing Considerations
- The only insulin administered via IV
- “Clear” in appearance
- When mixing with NPH, draw Regular insulin FIRST
- Clear before cloudy, or “RN” - regular before NPH
- Drug Names