hrtrelay — harm reduction toolkit
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⚠ important

this uses simplified pharmacokinetic models based on published data. individual variation is enormous — genetics, body composition, injection technique, and a hundred other things affect your actual levels. your bloodwork is the real answer, not this calculator.

calculating...

▸ adjust settings above and hit simulate

how this works

we use a single-compartment Bateman equation model — the same basic math used in pharmacology textbooks. each route has different absorption and elimination rates. the simulation stacks multiple doses to show how levels accumulate over a week.

ready hrtrelay v0.1 ♥