Different types will have slightly different formulations. But mostly, mouthwash is just alcohol with mint scent and flavor. Aspartame is being fazed out of over the counter medications.
Ingredients are eucalyptol, menthol, methyl salicylate , thymol,water, alcohol (26.9%), benzoic acid, poloxamer 407, sodium benzoate and carmel. No it dont contain aspartame.