Medical Calculator – SonDoctor.com
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Insulin Pen Prescription Calculator

A simple tool to help determine the number of insulin pens to prescribe for outpatients to avoid running out before the next visit.








How to Use

Suppose a patient who receives 24 units of Tresiba once daily visits the clinic for an insulin prescription, and their next appointment is scheduled in 3 months (90 days). How many insulin pens should be prescribed?

Although this can be calculated mentally or with a basic calculator, it may be confusing at times. This tool offers a faster and more intuitive way to calculate the required number of pens.

  • In this case, the patient is using Tresiba, and each Tresiba Flextouch pen contains 300 units of insulin. So, enter 300 in the first input field.
  • Since the patient uses 24 units per injection, enter 24 in the second field.
  • The patient injects once daily, so enter 1 in the third field.
  • The next follow-up visit is in 90 days, so enter 90 in the fourth field.
  • Click the "Required Number of Pens" button to get the result automatically.
  • Based on the result, prescribing at least 8 Tresiba Flextouch pens will ensure the patient doesn't run out of insulin.
  • You can use this calculator for different types of insulin pens, adjusting the values according to the number of injections per day and dose per injection.

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