A Study of NT 201 in Adults With Moderate to Severe Platysma Prominence in the United States

Inclusion Criteria: * Presence of four (medial and lateral, left and right) platysmal bands assessed at screening and baseline. * A score of Grade 3 ('moderate') or Grade 4 ('severe') on the MAPS-D at maximum contraction by the investigator and participant. Exclusion Criteria: * Hypersensitivity or a history of allergic reaction to botulinum toxin of any serotype or any of their formulation ingredients. * Any medical condition that may put the participant at increased risk with exposure to botulinum toxin of any serotype, or any disorders that might interfere with neuromuscular function. * Any serious disease or disorder that could interfere with the safe completion of treatment or with study outcome assessments, or compromise participant safety. * Botulinum toxin treatment in the face (below the lower orbital rim), jawline, or neck within the last seven months. * History of lower face surgery, neck or chest surgery, and aesthetic procedures in the past 12 months, and/or orthodontic procedures in the past 6 months. * Planned surgery or aesthetic procedures to the lower face, neck, or chest during the study period. * Anticipated need for treatment with botulinum toxin of any serotype for any indication during the study (other than study products).