“…However, botulinum toxin A had a lower incidence of autonomic side effects and pain at the injection site, which likely contributed to its preferential use by most clinicians. 31,32 Botulinum toxin A (Botox; Allergan, Irvine, CA) was approved by the Food and Drug Administration (FDA) in 2004 for the treatment of severe primary axillary hyperhidrosis in adults. Two newer class A botulinum toxins (Dysport; Ipsen Biopharm, Wrexham, UK; Xeomin; Merz Pharmaceuticals Inc, Greensboro, NC) have been approved by the FDA in 2009 and 2011, respectively, for the treatment of other conditions (eg, cervical dystonia) but have not yet received FDA approval for the treatment of hyperhidrosis.…”