Franck's Compounding Lab Inc., the Florida-based company that produced a vitamin and mineral compound blamed for the deaths of 21 polo horses last year, has temporarily lost its license to do business in Indiana. The horses died after receiving a selenium, vitamin B, and potassium compound prepared by the pharmacy. A subsequent investigation into the deaths revealed the compound contained levels of selenium toxic to horses. Franck's Pharmacy sells compounded drugs for both animal and human use in Indiana.

Last month, the US Food and Drug Administration (FDA) filed an injunction asking a federal court to stop the pharmacy from manufacturing and selling compounded drugs used to treat animals. Franck's denies the charges. That case remains pending.

On May 10, the Indiana Board of Pharmacy voted to suspend Franck's license to do business in that state for 90 days. Indiana authorities sought the suspension after receiving FDA notice of the injunction, said Pharmacy Board Director Phil Wickizer

"When we got the notice from the FDA, we filed a consumer complaint asking the Attorney General for the suspension," Wickizer said