Comparative Pharmacokinetics of a Once‐Daily Tramadol Extended‐Release Tablet and an Immediate‐Release Reference Product Following Single‐Dose and Multiple‐Dose Administration
Bibliographic record
Abstract
The pharmacokinetics of a once-daily formulation of tramadol (Tramadol Contramid OAD 200-mg tablets) following single-dose and multiple-dose administration was compared with that of an immediate-release product (tramadol IR 50-mg tablets) in 2 separate studies. In both studies, AUC parameters met bioequivalence criteria, whereas C(max) of Tramadol Contramid OAD was lower than that of tramadol IR following a 200-mg daily dosage. After single-dose administration, the mean tramadol concentration at 1 hour postdose was within the range associated with analgesic efficacy (>100 ng/mL), and the mean concentration remained above this level for the remainder of the dosing interval. Steady state was attained within 48 hours following multiple-dose administration. Tramadol Contramid OAD provides a rapid rise in plasma concentrations and an equivalent daily systemic exposure as tramadol IR, with a reduction in peak plasma concentrations.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.003 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.002 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".