UPDATE, 8:32 AM: Brokaw tweets that “All is well.” He says that this morning “I mistakenly took a half dose of Ambien and made less sense than usual. Made a better comeback than Giants.”

PREVIOUS, 7:09 AM: The long-time NBC newsman felt light-headed after appearing this morning on MSNBC’s Morning Joe, and was taken to the hospital “out of an abundance of caution,” the network told website TV Newser. Brokaw, 72, has kept a busy schedule during the Republican and Democratic presidential nominating conventions. Over the last few days he was interviewed by Sean Hannity on Fox News, on The Daily Show With Jon Stewart, and on CNN. In addition to discussing politics, Brokaw is promoting the paperback publication of his book The Time Of Our Lives.

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