. . . . "Buffers, pharmaceutically-acceptable surfactants, oils or cosolvents such as polyethylene glycol, polypropylene glycol, glycerol or ethanol, glidants (such as silicon dioxide) or complexing agents such as a cyclodextrin (for example, hydroxy-propyl ??-cyclodextrin or sulfo-butyl-ether ??-cyclodextrin) may be used to aid formulation." . .