Heroin had great claims made about it, too. It was named "heroin" for its "heroic" qualities.
And, of course, cocaine is the wunderdrug of all wunderdrugs for restoring strength, endurance, and clarity of thought.
Laetrile would right up there, too, if it only made people high as well as curing their cancer.
I hear it makes you incoherent too..