Plantar Wart-remedies

Cruz had has this planters wart for at least 9 months now.  Our pediatrician froze it twice, nothing.  We just went to a dermo and she froze it again, but -she recommended he take Tagament everyday (they are not sure why, but it helps warts go away) and then he scrapes it every night with a scraper and puts this concoction on she called in to University of Utah...it seems to be helping more!!!