A composition comprising: (a) at least one compound of formula (I): ** formula ** in which Q- represents the conjugate base of a pharmaceutically suitable organic or inorganic acid； R1 and R'1 are independently selected from hydrogen and substituted or unsubstituted C1-6 alkyl； R2 and R2 are independently selected from a substituted or unsubstituted aryl radical； R3 and R'3 are independently selected from hydrogen, halogen, -CF3, -OH, -NH2, -O-C1-6 alkyl and substituted or unsubstituted C1-6 alkyl； or R3 and R'3 together with R4 and R'4 respectively, and independently of each other, form a radical -CH>； = CH-CH>； = CH- substituted or unsubstituted； R4 and R'4 are independently selected from hydrogen, halogen, -CF3, -OH, -NH2, -O-C1-6 alkyl and substituted or unsubstituted C1-6 alkyl； or R4 and R'4 together with R3 and R'3 respectively, and independently of each other, form a radical -CH>； = CH-CH>； = CH- substituted or unsubstituted； m is 0 or 1； n is an integer selected from 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10； p is 0 or 1； with the proviso that m, n and p are not zero at the same time； or a solvate thereof, and (b) at least one cyclodextrin or a liposome.Una composición que comprende: (a) al menos un compuesto de fórmula (I):**fórmula** en la que Q- representa la base conjugada de un ácido orgánico o inorgánico farmacéuticamente adecuado； R1 y R'1 se seleccionan independientemente de hidrógeno y alquilo C1-6 sustituido o no sustituido； R2 y R'2 se seleccionan independientemente de un radical arilo sustituido o no sustituido； R3 y R'3 se seleccionan independientemente de hidrógeno, halógeno, -CF3, -OH, -NH2, -O-alquilo C1-6 y alquilo C1-6 sustituido o no sustituido； o R3 y R'3 junto con R4 y R'4 respectivamente, e independientemente uno de otro, forman un radical -CH>；=CH-CH>；=CH- sustituido o no sustituido； R4 y R'4 se seleccionan independientemente de hidrógeno, halógeno, -CF3, -OH, -NH2, -O-alquilo C1-6 y alquilo C1-6 sustituido o no sustituido； o R4
