BOSTON (AP) – A company that distributed human growth hormone to “well-known athletes and entertainers” has agreed to pay a $10.5 million penalty, change its business practices and cooperate with law enforcement in ongoing investigations, federal prosecutors said Tuesday.

Under the terms of the agreement, Specialty Distribution Services Inc., a subsidiary of Express Scripts Inc., will not face prosecution for three years if it fully complies with terms of the agreement.

Steve Littlejohn, a spokesman for St. Louis-based Express Scripts, said the company fully cooperated in the federal investigation and has already implemented procedures to prevent the illegal distribution of human growth hormone.

“Express Scripts does not condone the use of human growth hormone for anti-aging, cosmetic or performance enhancement purposes,” the company said in a prepared statement.

Specialty Distribution Services “knowingly distributed human growth hormone to certain well-known athletes and entertainers, including a well-known athlete in Massachusetts, knowing that their intended use was athletic performance enhancement, cosmetic or anti-aging,” in violation of federal law, the U.S. attorney’s office said in a statement.

The statement did not mention any names.

The drug in question was approved by the Food and Drug Administration only for specific purposes, including treatment of children with growth failure due to inadequate growth hormones, prosecutors said.

AP-ES-09-18-07 1610EDT