Which Lovenox vial contains the highest amount of medication?

The option that contains the highest amount of medication is the vial labeled with 150 mg in 1 ml. This is determined by comparing the total dosage of medication contained in each vial. In this case, the 150 mg vial obviously has the highest concentration of active ingredient.

To assess the other options, the 120 mg vial contains less than the 150 mg vial, and both the 100 mg and 80 mg vials also contain even lower quantities. Therefore, when evaluating the total amount of medication available for administration, the 150 mg vial unequivocally surpasses the other choices in terms of dosage. This makes it the correct choice for this question.