EP0579435A1 — Cyclodextrin complexation

USPTO Abstract

The invention provides a method for enhancing the complexation of a cyclodextrin with a lipophilic and/or water-labile drug, comprising combining from about 0.1 to about 70% (weight/volume) of a cyclodextrin and from about 0.001 to about 5% (weight/volume) of a pharmaceutically acceptable, pharmacologically inactive, water-soluble polymer in an aqueous medium, the polymer and cyclodextrin being dissolved in the aqueous medium before the drug is added, the aqueous medium which comprises the polymer and cyclodextrin being maintained at from about 30 to about 150°C for a period of from about 0.1 to about 100 hours before, during and/or after the drug is added, optionally followed by removal of water. Related methods, co-complexes of drug/cyclodextrin/polymer, pharmaceutical compositions and cyclodextrin/polymer complexing agents are also provided. Analogous methods, co-complexes and compositions in which the drug is replaced with a food additive, cosmetic additive or agrochemical are also described.