It is possible to be fully sedated, but it's not generally recommended.
Usually what is used is called conscious sedation. This means that you would be awake but comfortable and able to breath on your own.
Fully sedated means general anesthesia, during which an anesthesiologist breathes for you. That is not necessary and would make the procedure more risky for you.
A local anesthetic throat spray is also used, which helps greatly.
Different patients have different levels of need for anesthesia, and your need will be taken into consideration and honored.
Talk to your doctor ahead of time about your fear of the procedure. Hopefully your doctor will be able to calm your fears.
Most patients are comfortable during endoscopy and are give as much anesthesia and they wish and is safe. Best wishes.
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