A Precision Dosing Regimen (PDR) is a therapeutic plan where the dose of an active compound, often a hormone or a modulator, is determined by integrating individual physiological data points—including baseline levels, receptor sensitivity, and metabolic clearance rate—rather than relying on standardized population averages. The regimen is designed to achieve a specific, pre-defined molecular effect with the minimum necessary dose. PDRs aim to maximize therapeutic benefit while actively minimizing off-target effects and negative feedback suppression. It is the antithesis of one-size-fits-all prescribing.
Origin
This concept originates from the movement toward personalized medicine, emphasizing quantitative, data-driven prescription tailored to individual pharmacogenomics and physiology. Dosing implies the specific amount administered, while precision dictates the narrowness of the therapeutic target achieved. The origin recognizes that hormonal systems exhibit high inter-individual variability in response. A PDR is the practical application of this variability awareness.
Mechanism
The mechanism relies on continuous feedback loops, where initial dosing is followed by objective measurement of circulating levels and functional outcomes, allowing for rapid algorithmic adjustment. For example, a PDR for thyroid hormone considers not just TSH but also free T3 and reverse T3 to ensure optimal cellular energy signaling. By titrating the dose based on the actual metabolic response observed in the patient, the regimen effectively navigates individual differences in absorption and receptor affinity. This iterative process locks the patient into their optimal therapeutic steady state.
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