Purpose: The solubility of orally administered hydrophobic drugs ismajor challenge for pharmaceutical formulators as nearly 35-40% of newly launched drugs possess low aqueous solubility which leads to poor dissolution and low bioavailability, resulting in high intra&inter subject variability&lack of dose proportionality.
Approach: Self-Emulsifying Drug Delivery System, (SEDDS) is gaining popularity for improving the solubility of lipophilic drugs. Therefore, various formulation strategies have been investigated to improve the solubility and the rate of dissolution to enhance the oral bioavailability of lipophilic drugs.
Finding: This review mainly discusses about the mechanism of SEDDS, excipient used in SEEDS, dosage forms, evaluation, applications, advantages and drawbacks.
Conclusion: SEDDS form fine emulsions (or micro-emulsions) in gastro-intestinal tract (GIT) with mild agitation provided by gastric mobility. Many parameters like surfactant concentration, oil/surfactant ratio, polarity of the emulsion, droplet size and charge plays a critical role in oral absorption of drug from SEEDS.
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