Dosage Regimens: Partial Pharmacokinetic Parameters

The complete pharmacokinetic profiles of many drugs are often unknown or unavailable.

So, researchers need to make a few assumptions to calculate dosage regimens without pharmacokinetic data, depending on the drug's safety, efficacy, and therapeutic range.

One common assumption is setting the bioavailability factor, F, to 1 or 100%.

This ensures that if a drug is not fully absorbed, patients are undermedicated rather than overmedicated.

Population pharmacokinetics uses the average patient population characteristics with limited serum drug concentration samples from patients.

Population pharmacokinetics’ use in therapeutic drug monitoring has increased due to the availability of computerized databases and the development of statistical tools for observational data analysis.