A Comprehensive Review of Self-Nanoemulsifying Systems in the Delivery of Herbal Drugs.

Self-nanoemulsifying drug delivery systems (SNEDDS) are an isotropic mixture of oils, co-surfactants, and surfactants and can form fine O/W Nanoemulsions in aqueous media. These components are advantageous in terms of improved solubility and bioavailability. Limited permeability, solubility, and bioavailability remain a significant challenge in developing herbal drugs. This review explores the potential of self-nanoemulsifying drug delivery systems (SNEDDS) as a promising strategy to overcome this problem. The SNEDDS is considered a novel technique for the delivery of low water-soluble drugs. It can bypass the first-pass metabolism, resulting in steady and sustained drug levels in the systemic circulation. The present article provides a comprehensive overview of the SNEDDS formulation of herbal drugs. It includes their composition, characterization, in vitro and in vivo studies conducted in various disease conditions, and pharmacokinetic studies.