Design and evaluation of polymer coated carvedilol loaded solid lipid nanoparticles to improve the oral bioavailability: a novel strategy to avoid intraduodenal administration.

Solid lipid nanoparticles are most promising delivery systems for the enhancement of bioavailability of highly lipophilic drugs those prone to the first pass metabolism. But burst release of drug from solid lipid nanoparticles in acidic environment such as gastric milieu precludes its usage as oral delivery system. Studies on SLN revealed intraduodenal administration as an alternative route for SLN administration.