A Florida company is recalling 5,000 bottles of a product called Zen that it sold as a dietary supplement, but which the government says contains a dangerous and illegal drug called BD.

BD is chemically related to the illegal "party drugs" and sleep aids GHB and GBL.

The Food and Drug Administration considers the drugs significant health hazards because they have been associated with at least three deaths and 119 other serious side effects, including comas, breathing difficulty, vomiting and seizures. They are particularly dangerous when used with alcohol.

BD, also sold as an industrial solvent, became notorious three years ago when more than 100 New Year's party-goers in Los Angeles became sick after consuming drinks containing the chemical.

The FDA last year began hunting for companies that sell the chemicals under the guise of dietary supplements, in a renewed attempt to get them off the market.

Yesterday, Science Enhancement Systems of Delray Beach, Fla., said it had agreed to recall 5,400 bottles of Zen distributed in 24 states since last April.

Consumers should not drink Zen, but return it to the place of purchase for a refund, the company said. Consumers with questions may call the company at 561-707-1001.

Zen is a liquid sold in 35-ounce bottles that list the ingredient Sucol B, which is really BD, the company said.