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[Antibiotic stability in magistral collyria].
A Tihărău1, E Voiculescu, S Vancea
1Laboratorul de Microbiologie, I.C.S.M.C.F.
Oftalmologia (Bucharest, Romania : 1990)
|April 1, 1990
Summary
This study evaluated the stability of ophthalmic solutions containing Kanamicin, Oxacilin, Colistin, Erythromycin, and Rifampicin. Optimal preparation involves specific solvents and storage at 4°C in the dark to maintain antibiotic efficacy.
Area of Science:
- Pharmaceutical Sciences
- Microbiology
- Ophthalmology
Background:
- Ophthalmic solutions require careful formulation to ensure stability and efficacy.
- Antibiotic eye drops are crucial for treating ocular infections but can degrade over time.
Purpose of the Study:
- To assess the physicochemical and microbiological stability of collyria containing Kanamicin, Oxacilin, Colistin, Erythromycin, and Rifampicin.
- To determine optimal preparation and storage conditions for these antibiotic ophthalmic solutions.
Main Methods:
- Physicochemical stability tests were performed on the antibiotic collyria.
- Microbiological stability assays were conducted to evaluate antibiotic effectiveness.
- Standardized solvents for eye drops, as per RF IX, were utilized.
Main Results:
- The study determined the stability profiles of Kanamicin, Oxacilin, Colistin, Erythromycin, and Rifampicin in ophthalmic formulations.
- Specific conditions were identified that best preserve the integrity of the antibiotics.
- Degradation pathways or loss of potency were observed under non-ideal conditions.
Conclusions:
- The preparation of ophthalmic solutions with the studied antibiotics requires adherence to specific guidelines.
- Storage at +4 degrees C and in the dark is essential for maintaining the stability and efficacy of these antibiotic eye drops.
- Utilizing the solvent for eye drops as provided for by RF IX is recommended for optimal formulation.