Synonyms for Helminthic (same or very similar meaning)
WordNet sense 1 (a medication capable of causing the evacuation of parasitic intestinal worms):
anthelminthic, anthelmintic, vermifugeWordNet sense 2 (capable of expelling or destroying parasitic worms):
parasiticidalWordNet sense 3 (conducive to good health of body or mind):
healthfulFrom the ODE community, based on WordNetadd/edit