1. the time by which something must be finished, submitted, etc. 2. (formerly) a boundary around a military prison beyond which a prisoner could not venture without risk of being shot by the guards.
While it's important to talk with your doctor about the cause of your slurred speech, slurred speech caused by anxiety is not dangerous. It's not a sign that you have something else coming, or that your brain will somehow be inefficient for handling life tasks in the future.
Call your doctor at once if you have any of these serious side effects: slurred speech; loss of balance or coordination; easy bruising or bleeding; or; unusual weakness. Less serious side effects may include: dizziness, drowsiness, spinning sensation; nausea, vomiting, loss of appetite; feeling irritable; blurred vision; mild skin rash; or