A storage stable topical pharmaceutical composition containing zinc erythromycin, particularly useful in the topical treatment of acne vulgaris, is disclosed. This composition contains a solvent having a dielectric constant, measured at 25°C, of from about 5.5 to about 15, preferably from about 8 to about 12. such as t-butanol, to impart storage stability to the zinc erythromycin component. The composition may additonally contain particularly selected pharmaceutically-acceptable ni- trogencontaining stabilizer components, such as diisopropanolamine.
本发明公开了一种含有
红霉素锌的贮存稳定的外用药物组合物,尤其适用于寻常痤疮的外用治疗。该组合物含有一种溶剂,其介电常数(在 25°C 时测量)约为 5.5 至 15,优选约为 8 至 12,如
叔丁醇,以赋予
红霉素锌成分储存稳定性。该组合物还可添加特别选定的药学上可接受的含氮稳定剂成分,如
二异丙醇胺。