50 years of oral lipid-based formulations: provenance, progress and future perspectives Orlagh M. Feeneya, Matthew F. Cruma,b, Claire L. McEvoya, Natalie L. Trevaskisa, Hywel D. Williamsc, Colin W. Poutona, William N. Charmana, Christel A. S. Bergströmd and Christopher J.H. Portera,b a. Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, Victoria, 3052, Australia. b. ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria, Australia c. Capsugel R&D Australia, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Victoria 3052, Australia. d. Department of Pharmacy, Uppsala University, Uppsala Biomedical Centre, P.O. Box 580, SE-751 23 Uppsala, Sweden Corresponding author: Christopher J.H. Porter Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University 381 Royal Parade, Parkville, Victoria, 3052, Australia Phone: +61(3) 990 39649 Email:
[email protected] Keywords: Poorly water soluble drugs Lipid based formulations Self emulsifying drug delivery systems In vitro digestion Supersaturation Solubilisation 1 Abbreviations: AP Aqueous phase API Active pharmaceutical ingredient b-r-o-5 Beyond rule-of-five BS Bile salt DG Diglyceride FA Fatty acid GIT Gastrointestinal tract IL Ionic liquid LBF Lipid based formulation LCT Long chain triglyceride LFCS Lipid formulation classification system MCT Medium chain triglyceride MG Monoglyceride PL Phospholipid PWSD Poorly water soluble drug S Supersaturation Ratio SEDDS Self emulsifying drug delivery system SMEDDS Self microemulsifying drug delivery system SNEDDS Self nanoemulsifying drug delivery TG Triglyceride UWL Unstirred water layer 2 Abstract: Lipid based formulations (LBF) provide well proven opportunities to enhance the oral absorption of drugs and drug candidates that sit close to, or beyond, the boundaries of Lipinski’s ‘rule-of-five’ chemical space.