Physical Compatibility and Chemical Stability of Injectable and Oral Ranitidine Solutions
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Bibliographic record
Abstract
Objectives: The physical compatibility and chemical stability of ranitidine hydrochloride injectable solutions and oral syrup were studied to define beyond-use dates (BUDs). Methods: Ranitidine hydrochloride injectable solutions of 25 mg/mL packaged in glass vials and 5 mg/mL in polypropylene (PP) syringes were prepared in triplicate. Samples were refrigerated and protected from light (PFL) or stored at 25°C and either exposed to light (ETL) or PFL. Ranitidine hydrochloride oral syrup 15 mg/mL in unit-dose amber PP syringes were prepared in triplicate and then kept at 25°C. Samples were collected at days 0, 7, 14, 28, 56, and 91. Additional samples were collected at 6 months and at 6, 9, and 12 months for the 25 mg/mL solution and oral syrup, respectively. Physical parameters of pH, clarity, and color were obtained at each collection time. A validated stability-indicating high-performance liquid chromatography (HPLC) method was used to determine the chemical stability. Results: Formulations had no significant change in pH or clarity. Although some samples yellowed, this was not associated with a decrease in concentration. The 25 mg/mL solution remained above 98.6% for 6 months, whereas the 5 mg/mL solution remained above 93.5% for 91 days under all storage conditions. At 25°C, the oral syrup retained greater than 98.8% for 12 months. Conclusions: The ranitidine hydrochloride injectable solutions were stable for 6 months and 91 days under the 3 storage conditions, respectively, for the 25 mg/mL solution in glass vials and 5 mg/mL solution in PP syringes. The 15 mg/mL oral syrup in unit-dose amber PP syringes was stable for 12 months at 25°C and PFL.
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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 | 0.000 | 0.000 |
| 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 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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 it