Brokaw, 72, is in town for the Democratic National Convention. He fell ill after appearing on the MSNBC program "Morning Joe."
"After medical evaluation and a round of tests, Tom was pronounced in great health and has been discharged. We're immensely grateful to the team at Carolinas Medical Center for their excellent care and professionalism," NBC News President Steve Capus said in a statement Thursday afternoon.
"All is well. Early AM I mistakenly took a half dose of Ambien and made less sense than usual. Made a better comeback than Giants..." Brokaw tweeted.
2014: The Year in Fashion [PHOTOS]
Alyssa Milano departs ABC's 'Mistresses'