No, its not because Beck has gone off his meds.
David Frum points out the obvious about Glenn Beck–he sounds crazy to attract an audience:
Many people have suggested that since the crisis in Egypt began Fox News’ Glenn Beck sounds crazier than usual.
This is a hard assessment to quantify. But if it is true, the uptick in craziness may be attributable to the decline in Beck’s audience.
Frum supported this view by reprinting an old post by Tim Mak on how “crazy talk” drives talk radio. This could also be supported with Beck’s own words when he described himself as a rodeo clown and pointed out that “If you take what I say as gospel, you’re an idiot.”