This final episode reframes dosage regimen design as the pharmacology of intentional calibration. Pharmacokinetic data are not abstractions-they are tools for shaping exposure over time to maximise benefit and minimise harm. We revisit absorption, distribution, clearance, half-life, and steady state to show how loading doses, maintenance dosing, interval selection, and adjustments for organ function convert equations into care. The emphasis is practical wisdom: knowing when to calculate, when to simplify, and when to individualise.

Key takeaways to complete the series:

* Exposure over time: why AUC, peaks, and troughs matter clinically.

* Regimen architecture: loading vs maintenance, interval vs dose size.

* Patient factors: renal/hepatic function, age, weight, and comorbidity.

* Variability and uncertainty: population averages vs individual reality.

* Safe translation: using PK to guide-not replace-clinical judgement.

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