 This research study will be conducted in two stages - Stage A and Stage B. If enrolled in the Stage A of the study, the subject will have an equal chance of getting either bivalent botulism antitoxin or placebo. If enrolled in Stage B of the study, the subject will have an equal chance of getting heptavalent botulism antitoxin NP-018 or placebo. The subject will be receiving injections of Botox and Myobloc on the next day after the antitoxin administration in the left and right foot respectively. The subjects participation in this study will be for maximum of 57 days. 