Estabilidad de gotas nasales de efedrina.

The subject of this paper is a stability study of ephedrine nasal drops. We started by assessing the influence of preservative agents in the stability of the formulation. Ephedrine hydrochloride was proven to be incompatible with chlorobutanol. This led the researchers to choose a combination of benzalkonium chloride and edetate disodium, which yielded excellent results in terms of effectiveness. Three pilot batches of the formulation were prepared, and stability studies were carried out under the accelerated and shelf-life methods. For the six-month period of the accelerated stability study and the 24-month period of the shelf-life study, organoleptic characteristics were within established acceptable limits. The pH of the medium also remained stable, within acceptable limits. The degradation of the active ingredient was not greater than 5%, which indicates good stability. The concentration of preservative agents and microbial count in the finished product were also within established parameters. The formulation was packaged in amber glass bottles of hydrolytic quality III and 15 mL nominal capacity, with an 18 mm polypropylene cap and an HDPE internal dropper, and it showed adequate physical, chemical and microbiological stability during the 24 months of the shelf life stability study. [ABSTRACT FROM AUTHOR]