Dosing Interval Calculator
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Dosing Interval Calculator
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Dosing Interval Calculator
Calculate an estimated pharmacokinetic dosing interval using drug half-life and desired peak-to-trough fluctuation.
Enter the drug’s elimination half-life.
Example: a ratio of 2 means the peak concentration is twice the trough concentration.
ESTIMATED DOSING INTERVAL
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Based on the entered pharmacokinetic parameters
Interval in Hours
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Interval in Days
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Half-Life
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Peak:Trough
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Formula Used
τ = t½ × log₂(Cmax / Cmin)
Where τ is the dosing interval, t½ is the elimination half-life,
and Cmax/Cmin is the desired peak-to-trough concentration ratio.
Educational use:
This calculator provides a pharmacokinetic estimate and should not
be used alone to determine a patient’s actual medication regimen.
Clinical dosing intervals may depend on drug characteristics,
indication, renal/hepatic function, therapeutic targets,
formulation, age, and other patient-specific factors.