effects of transcutol p and precirol ato-5 on percutaneous absorption of flutamide from emulgels

Background: flutamide is a non-steroidal anti-androgenic agent which is not only used in treating prostate cancer but also can be effective in some disorders such as androgenic alopecia and male pattern baldness. several serious side effects for systemic administration of flutamide can be overcome by emulgel dosage form. absorption enhancers can promote permeation of flutamide through skin. percutaneous absorption of flutamide emulgels with different concentrations of transcutol p and precirol ato5 was studied. methods: various emulgel formulations using different concentrations of transcutol p and precirol ato5 with 0.5 to 5% w/w were prepared. percutaneous absorption was tested with standard franz diffusion cell equipment using full thickness rat skin. drug concentrations in the samples were analyzed by high-performance liquid chromatography (hplc) equipped with uv-vis detector at 305 nm. results: the percutaneous absorption of flutamide emulgels formulated with enhancers was higher than control formulations. the enhancement ratio increased from 1.218 to 3.670 and 1.346 to 3.900 for precirol ato5 and transcutol p, respectively. the area under the curve (auc) increased by increasing the enhancers’ concentration and a significant upsurge was seen in the concentration 1% for both enhancers. conclusion: the flutamide emulgel containing 1% transcutol p showed more appropriate percutaneous absorption through the skin compared to others.