作者
Amit Bhatia, Rajiv Kumar, Om Prakash Katare
发表日期
2004/7/16
期刊
J Pharm Pharm Sci
卷号
7
期号
2
页码范围
252-259
简介
Purpose: Tamoxifen, an anti-estrogen compound, has recently been figured as a useful agent in the treatment of certain skin specific disorders. This recent found application has generated an interest in its topical formulation in order to avoid the side effects associated with oral administration, while parenteral administration is restricted due to its limited aqueous solubility. Liposomal carriers, well known for their potential in topical drug delivery, have been chosen to help transport tamoxifen molecules in the skin layers. These vesicles are also expected to provide lipid enriched hydrating conditions to help retain the drug molecules within the dermal layers, at or near to the site of action. With this objective, tamoxifen loaded liposomal systems have been prepared and their topical performance has been compared with non-liposomal systems containing tamoxifen. Method: Multilamellar liposomes of tamoxifen were prepared by thin film hydration method. Various formulation (viz. lipid composition, drug-lipid ratio, amount and type of surface charge imparting agent etc.) and process parameters (hydration temperature, hydration time etc.) were studied to obtain liposomes with desired attributes. Prepared liposomes were characterized for morphological and micromeritic attributes, employing Malvern mastersizer and optical microscopy. Stability of the liposomes in terms of their drug holding capacity was assessed for a period of 5 weeks, on storage under defined conditions. Liposomal formulations of tamoxifen were evaluated for in-vitro skin permeation, using mice skin. The results thus obtained were compared with that of aqueous solution and …
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