Cylert
Cylert (pemoline) was a drug used for attention deficit hyperactivity disorder for thirty years before it was discontinued.
In some patients pemoline has been suspected of causing hepatotoxicity (liver toxicity), so the FDA recommended that regular liver tests should be performed on those treated with it.
Despite attempted efforts to make doctors and patients aware of the risk, the drug has been linked with a number of cases of liver failure, of which 13 resulted in liver replacement or death.