Twenty patients with a visual analog scale ( VAS ) sweating score 8 cm were randomized to receive lidocaine 2 % ( 5 mL ) delivered by JetPeel-3 followed by multiple injections of BTX-A ( 100 units ) or lidocaine 2 % ( 5 mL ) and BTX-A ( 50 units ) delivered together by JetPeel-3 .