Jose Padilla's lawyers say he was forced to drop acid. TPM has some background:

Of course, the U.S. government pioneered research into LSD in particular in the 1950s and 60s. CIA officers even tested the drug by surruptitiously dosing each other, leading at least one acid-tripping spook to run in a paranoid frenzy through Washington D.C. and over a bridge into Virginia, where his co-workers later found him cowering under a fountain.