Stability and Compatibility of Combinations of Hydromorphone and a Second Drug
Bibliographic record
Abstract
ABSTRACT The stability and compatibility of binary combinations of hydromorphone at three concentrations (2, 10 and 40 mg/ml) and seven other medications (ampicillin, cefazolin, ceftazidime, cloxacillin, diazepam, phenytoin and phenobarbital) were evaluated for 24 hours at room temperature. In addition to visual inspection and pH, the concentration of each component in the binary mixture was determined by a stability indicating liquid chromatographic method. Each test was completed at time zero, 4, 8 and 24 hours after mixing equal volumes of each medication. Incompatibilities were observed when equal volumes of hydromorphone were mixed with either diazepam (5 mg/mL), phenobarbital (120 mg/ml) or phenytoin (50 mg/ml). Cefazolin was observed to be incompatible only when concentrations of cefazolin exceeded 200 mg/mL. Cloxacillin was observed to be incompatible with hydromorphone only when cloxacillin had been diluted with 5% dextrose in water (D5W) and the concentration exceeded 24 mg/ml. Cloxacillin is compatible with hydromorphone when an equal volume of a 250 mg/ml solution (reconstituted according to the manufacturer's directions) is mixed with hydromorphone. Ampicillin was observed to be compatible at concentrations of 20 mg/ml (diluted in D5W) and 250 mg/mL, but ampicillin retained more than 90% of the initial concentration for only four hours. Ceftazidime (40 mg/ml in D5W or 250 mg/ml) was physically compatible and chemical stable in the presence of hydromorphone. Hydromorphone was chemically stable in all solutions and never precipitated. RESUME Les stabilites et compatibilites d'associations binaires d'hydromorphone a trois concentrations (2, 10 et 40 mg/ml) et de sept autres medicaments (ampiciline, cefazoline, ceftazidine, cloxacillin, diazepam, phenytoine et phenobarbital) furent evaluees pendant une periode de 24 heures a la temperature de la piece. En plus d'une inspection visuelle et au pH, la concentration de chaque element du melange binaire fut determinee en utilisant la methode d'un solvant chromatographique determinant la stabilite. Chaque examen fut complete aux temps 0, 4, 8 et 24 heures apres avoir melange en volumes egaux chaque medication. Des incompatibilites furent observees lorsque des volumes egaux d'hydromorphone et de diazepam (5 mg/mL), de phenobarbital (l20 mg/ml,) ou de phenytoine (50 mg/mL) furent melanges. Il y eu incompatibilite seulement lorsque les concentrations de cefazoline depassaient 200 mg/mL. La cloxacilline etait incompatible avec l'hydromorphone, seulement quant elle etait diluee dans l'eau avec 5 p.c. de dextrose (D5W) et que la concentration depassait 24 mg/mL. Elle etait compatible avec l’hydromorphone lorsque melangee en volumes egaux d'une solution a 250 mg/mL (reconstituee selon les directives du fabricant). L'ampicilline etait compatible (diluee dans le D5W) a des concentrations de 20 mg/mL et de 250 mg/mL, mais conservait retenu plus de 90 p.c. de la concentration initiale pendant quatre heures seulement. La ceftazidime etait compatible physiquement (40 mg/mL dans D5W ou 250 mg/mL) et chimiquement stable en presence de l'hydromorphone. L’hydromorphone etait stable chimiquement dans toutes solutions et ne precipitait jamais.
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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 | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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 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".