Generally, there is no need to wake up sleep talkers as it lasts only for a brief time and passes away with the sleeper not remembering anything after waking up. It is still not advisable to wake up the person if sleep talking is a symptom of a nightmare, terror dream, or sleep disorder. It should be allowed to pass. If woken up in the middle, the sleeper might turn violent and hit you or feel disoriented and confused after waking up. It might also make the person emotionally unstable.