Interrupt Spell Casting in Macro

[TAR]

Is there a command, or a way to interrupt casting mid cast in a macro? I've been writing a macro and it often will cast when a mob is low health, but another caster will get a nice big crit in and the mob will die. I would want the original caster to stop casting (/duck) if possible.

Thanks,

 

[Sym]

You can but there really isn't a major reason to. Casts on mobs that die mid cast won't use mana.