Is There a Role for Therapeutic Drug Monitoring With Codeine?
Bibliographic record
Abstract
Codeine is an old and commonly used analgesic agent for mild to moderate pain. It is the prototypical "prodrug" in that its analgesic effect is almost wholly dependent on its biotransformation to morphine, a process that is mediated by the polymorphic cytochrome P450 2D6 enzyme. As such, interindividual variability in codeine metabolism and response is a clinical reality, and there has been much progress in characterizing the genetic causes of this variability in diverse populations. Yet despite the potential for both life-threatening adverse reactions and lack of therapeutic effect, codeine is not commonly indicated for therapeutic drug monitoring. This review will discuss the relative role of pharmacogenetics and therapeutic drug monitoring in predicting and/or maintaining adequate and safe analgesia with codeine. The review will end on a discussion of how the marriage of these 2 fields may provide new insights into the mechanisms of codeine-induced toxicity and analgesia.
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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 | 0.002 | 0.000 |
| Meta-epidemiology (narrow) | 0.002 | 0.002 |
| Meta-epidemiology (broad) | 0.003 | 0.001 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.002 | 0.000 |
| Research integrity | 0.001 | 0.003 |
| 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; both teacher heads agree on what is shown here.
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".