A Miami attorney, who prevailed on behalf of pharmaceutical client GlaxoSmithKline in Massachusetts federal court after years of litigation, is expecting only a short breather.

Hildy Sastre, a partner at Shook, Hardy & Bacon in Miami, argued the winning motion in the multidistrict litigation, or MDLs, involving her client GlaxoSmithKline, whose product, Zofran, allegedly caused birth defects in more than 450 babies whose mothers used the medication during pregnancy.