Sertraline Half-Life
The elimination half-life of sertraline is approximately 26 hours, allowing for once-daily dosing. 1
Pharmacokinetic Details
According to FDA labeling, sertraline demonstrates an average terminal elimination half-life of about 26 hours in plasma following oral administration 1. This pharmacokinetic parameter means steady-state plasma levels are achieved after approximately one week of once-daily dosing.
Key Pharmacokinetic Characteristics:
- Peak plasma concentrations (Cmax) occur between 4.5 to 8.4 hours post-dosing 1
- Steady-state achievement: Approximately 7 days with once-daily dosing 1
- Accumulation: Approximately two-fold accumulation occurs with repeated dosing compared to single doses 1
Active Metabolite Considerations
N-desmethylsertraline, the principal metabolite, has a substantially longer elimination half-life of 62 to 104 hours 1. However, this metabolite is substantially less pharmacologically active than the parent compound, so the clinical relevance is primarily related to drug accumulation rather than therapeutic effect 1.
Age and Gender Variations:
Research demonstrates some variability in half-life based on demographics 2:
- Young males: 22.4 hours (shorter than other groups)
- Young females, elderly males, and elderly females: 32.1 to 36.7 hours
These differences suggest young males may metabolize sertraline more rapidly, though the clinical significance is minimal given once-daily dosing remains appropriate across all groups.
Clinical Implications
The 26-hour half-life supports: