Doremil Drugs was a Ferengi business, and the chief competitor of Chek Pharmaceuticals. In 2376, Krax invested heavily in Doremil Drugs while plotting to discredit Chek, the head of Chek Pharmaceuticals, and his campaign to bring down Grand Nagus Rom. Doremil stocks did indeed rise dramatically after this plot was exposed.(DS9 - Worlds of Star Trek: Deep Space Nine novel: Ferenginar: Satisfaction is Not Guaranteed)