. . advertisement . taking ustekinumab�a biologic that targets a different aspect of the immune system," gelfand said. http://lm360.us/Tillmon-grandpa-of-Mastella-from-Plank-Am-Kamp?Gurtnergr=252 erenumab (aimovig) is the first of four new migraine drugs in the pipeline that target calcitonin gene-related peptide (cgrp), a molecule that's produced in nerve cells of the . .