The government is warning consumers not to use eight liquid products that claim to provide “safe legal highs” or that are marketed as “street drug alternatives” by Cytotec Solutions Inc., because they may contain high levels of over-the-counter drugs diphenhydramine and dextromethorphan.

Today’s warning expands on a warning issued by the Food and Drug Administration in February over a product called Green Hornet, also marketed by Cytotec Solutions. February’s warning included details about adverse events experienced by four teenagers after they consumed Green Hornet Liquid.

“FDA has taken numerous actions against various products that are being manufactured, marketed, or distributed as street drug alternatives,” said Lester M. Crawford, D.V.M., Ph.D., Acting FDA Commissioner. “There is no doubt that these products pose a potential public health concern, and FDA is concerned that these products may be misused or abused by individuals, especially minors and young adults.”

The products included in this warning, which consumers should not use, are Trip2Night, Invigorate II, Snuffadelic, Liquid Speed, Solar Water, Orange Butterfly, Schoomz and Green Hornet Liquid. The labeling for these products lists a variety of herbal and other ingredients but does not provide either the name of the manufacturer or the presence of these drug ingredients, the FDA said in a statement issued today.

(via U.S. Food and Drug Administration)