Anaphylaxis to dextromethorphan with positive skin testing: a case report
Bibliographic record
Abstract
BACKGROUND: Dextromethorphan (DM) is a cough suppressant that is widely available in many prescribed and over-the-counter medications. Both immediate and delayed hypersensitivity reactions have been reported following the ingestion of DM. Anaphylaxis to DM is rare, with only three reported cases in the literature. Among these, skin prick testing for DM yielded a positive result in one case, a negative result in another, and was not performed in the third. CASE PRESENTATION: We present a rare case of anaphylaxis linked to DM, confirmed by skin testing. The patient experienced a severe allergic reaction after taking Vicks Dayquil Complete®, a common over-the-counter cold and flu medicine that contains acetaminophen, DM, phenylephrine hydrochloride, and guaifenesin. Among these, only DM triggered a positive response on skin testing. CONCLUSION: This case highlights an uncommon allergy to a combination cold medicine, with skin testing identifying DM as the cause.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.004 |
| Meta-epidemiology (narrow) | 0.003 | 0.002 |
| Meta-epidemiology (broad) | 0.002 | 0.002 |
| Bibliometrics | 0.004 | 0.002 |
| Science and technology studies | 0.003 | 0.003 |
| Scholarly communication | 0.003 | 0.003 |
| Open science | 0.002 | 0.003 |
| Research integrity | 0.008 | 0.005 |
| Insufficient payload (model declined to judge) | 0.003 | 0.001 |
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 source (direct Gemma or distilled Codex), 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".