Manny being Manny?

Manny Ramirez suspended 50 games for positive drug test

Los Angeles Dodgers slugger Manny Ramirez tested positive for a banned performance-enhancing substance, incurring an immediate 50-game ban and serving the highest-profile reminder yet that the use of such drugs in the testing area may have been reduced, but not eradicated.
Major League Baseball plans to announce the suspension later today. Ramirez, a baseball source told SI.com, explained to baseball officials he was uncertain that he was taking a banned substance and may have had a medical reason for using the substance.

The source said the substance was not classified as a steroid but was clearly defined as a banned performance-enhancer according to the drug agreement between baseball the players association. Banned substances can only be taken with prior knowledge and medical clearance from baseball's drug program administrators. Such exceptions are known as Theraputic Use Exemptions, or TUEs. The suspension is an indication that Ramirez did not have a TUE for the substance.
http://sportsillustrated.cnn.com/2009/baseball/mlb/05/07/manny/index.html