Shortly after warning three companies that they had violated FDA rules by making and marketing unapproved equine drugs, the FDA widened its lasso. The agency now says it has sent letters to 9 companies--all of which market drugs to treat ulcers in horses--warning that they are improperly selling the products without first obtaining FDA approval. Furthermore, the agency said, several of the drugs were either "subpotent," meaning they didn't include enough active ingredient, or "superpotent," containing too much of the advertised drug. The agency said the companies may be subject to injunctions or seizures and that anyone who bought the products should seek refunds. Release