The product is an herbal blend of Paico and Peppermint -- both possessing vermicidal properties, with the former the stronger contributor to this medicinal property. Despite the efforts of the medical establishment to "pooh-pooh" Paico's worm-killing capabilities, studies have consistency bore out its efficacy. In one study conducted in Peru [Span.] Paico demonstrated a 100% success rate in killing Ancylostoma and Trichuris (roundworm) and a 50% kill rate for Ascaris. Other studies describe the process by which intestinal worms are paralyzed by Paico and eliminated from the digestive tract.