Composición farmacéutica que contiene neurotoxina botulínica A2

Composición farmacéutica para uso en terapia que comprende toxina botulínica tipo A2 como principio activo, en donde dicha composición farmacéutica no contiene cantidades significativas de cualquier otra proteína derivada de Clostridium spp distinta de la neurotoxina botulínica, y en donde dicha composición farmacéutica no se usa para tratar el hirsutismo o hipertricosis. A composition, medicament or use, comprising or consisting of botulinum toxin type A2 and a surfactant, having one or more or all of the characteristics selected from the group consisting of : (a) a much longer duration of action; (b) a much faster rate of onset of muscular paralysis; (c) a significantly greater intramuscular safety margin; (d) a selective action on inhibition of skeletal muscle contraction; (e) a selective action on inhibition of pain-related (nociceptive) nerve cell function, wherein each characteristic is determined comparative to the same characteristic effect of botulinum toxin type A1.