Abstract
Transdermal delivery of bunazosin HCl and the enhancing effect of egg yolk lecithin were examined using an in-vitro hairless mouse skin preparation and rabbits for in-vivo systemic absorption. The delivery of bunazosin in-vitro was small, but it was significantly enhanced when lecithin was incorporated into the same vehicle. This enhancing effect was confirmed with other drugs in-vitro. The enhancing ability was also seen in-vivo. Very little bunazosin was delivered from a propylene glycol suspension, but levels of 100-200 ng mL-1 were achieved by the incorporation of the lechithin.
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