... more effec-tive. In a prospective, randomized, double-blind, parallel-group, dose-ranging study of 48 weeks, 60 women received 16, 32, or 48 U BTX-A Advanced Cosmetic Use of Botulinum Toxin Type ... more effective, longer-lasting results,especially in the mid- and lower face. Fagien and Brandt ( 25) found thatBTX-A in patients undergoing soft-tissue augmentation in certain facialareas, (i.e., ... BTX-B 50 00 U/mL and is available in 0 .5, 1.0, and 2.0 mL vials containing BTX-B,saline, human serum albumin, and sodium succinate as a buffer to preserveacid pH. The pH is approximately 5. 6,...