Accumulation Calculator
Track half-life based compound buildup
Calculate how compounds accumulate in the body over time based on half-life and dosing frequency. Understand steady-state concentrations and accumulation ratios.
Input Parameters
Time for concentration to decrease by half
Amount per administration
How often the compound is administered
Pharmacokinetic Results
Accumulation Ratio
1.00
x initial dose
Time to Steady State
4-5
half-lives (~95%)
Peak Steady State
250
mcg equivalent
Trough Level
125
mcg equivalent
Concentration Over Time
Understanding Accumulation
Accumulation Ratio
The factor by which drug levels increase from initial dose to steady state. Higher ratios indicate more buildup in the system. Calculated as 1/(1-e^(-k*tau)) where k is the elimination constant.
Steady State
The point where drug intake equals elimination per interval. Approximately 4-5 half-lives are needed to reach 94-97% of steady state. At this point, peak and trough levels remain constant.
Peak vs Trough
Peak (Cmax) is the highest concentration after dosing. Trough (Cmin) is the lowest, just before the next dose. The ratio between these indicates concentration fluctuation.
Clinical Significance
Compounds with long half-lives relative to dosing interval accumulate more. This must be considered when evaluating efficacy windows and potential side effects.
For Research Purposes Only
This calculator provides theoretical pharmacokinetic estimates based on simplified one-compartment models. Real-world pharmacokinetics involve complex factors including absorption, distribution, metabolism, and individual variation. This tool is for educational purposes only and should not guide medical decisions.