Background: The pharmacodynamic effects of digoxin are susceptible to multiple factors,
most notably, heart uptake of the digoxin dose and its concentration in the serum. Another important
factor to mention is the renal function state of an individual.
Objective: In this study, we aimed to develop a simple algorithm based on subsets of clinically relevant
information, which will help to personalize digoxin based on pharmacokinetic (PK) approach
which can help in marketing the appropriate utilization of this medication.
Methods: This was a retrospective chart review and analysis of 48 patients who were admitted to
the Drug and Poison Information center in Buraidah, Saudi Arabia, between January 2016 and
April 2019. All pharmacokinetic parameters were added according to the C-peaks and C-troughs.
MONOLiX® was used for data pharmacokinetic analysis.
Results: Twenty-seven (56%) were males and twenty-one (44%) were females with an average age
of 63.6 years across both genders. The mean volume of distribution was 496.6 litres with an average
clearance of 6.6 L/h. For females, their average volume of distribution was slightly higher than
that for males (526 litres compared to 473 litres). In addition, the clearance rate between both genders
showed a 2.1 litre/hour discrepancy (7.8 L/h for females compared to 5.7 L/h for males).
Conclusion: In order to individualize the digoxin dosage regimens, this model can be used to predict
digoxin serum concentration. Further studies are needed to clarify the effects of nutritional status
and co-administration of medications on digoxin pharmacokinetics.