Study of AGN-151607-DP to Assess Adverse Events and Change in Disease Activity in Adult Participants With Upper Limb Essential Tremor

Inclusion Criteria: * Minimum body weight of 50 kg (110 pounds) at Screening. * Diagnosis of essential tremor (ET) in accordance with the modified Tremor Research Investigation Group (TRIG) criteria, as follows: * Bilateral postural tremor with or without kinetic tremor, involving hands and forearms * Tremor of other body parts may or may not be present in addition to upper limb (UL) tremor * Bilateral tremor may or may not be asymmetric * Tremor that is reported by the participant to be persistent, although the amplitude may fluctuate. Exclusion Criteria: * History of any medical condition that may put the participant at increased risk with exposure to purified botulinum toxin type A complex, including diagnosed muscular dystrophy (e.g., Duchenne's muscular dystrophy), myasthenia gravis, Eaton-Lambert syndrome, amyotrophic lateral sclerosis, mitochondrial disease, or any other significant disease that might interfere with neuromuscular junctional disorders. * History of an allergic reaction to or significant sensitivity to AGN-151607-DP or its excipients and/or other botulinum toxins.