Pharmaceutical preparation comprises: (a) pharmaceutically active agent, which has an aromatic-group or -part and the molecule of which has a maximum diameter of >= 2 nm and (b) a permethylated cyclodextrin having a degree of substitution of 3 methyl groups per glucopyranose unit, where the components (a) and (b) form a complex. ACTIVITY : Anesthetic. MECHANISM OF ACTION : None given.