The answers come from
Anesthesia & You... Anesthesia for Ambulatory Surgery, an informational document prepared by the American Society of Anesthesiologists through the cooperative efforts of the Society's Committees on Communications and the Committee on Ambulatory Surgical Care.

For further information please visit www.asahq.org.
Will I need someone to take me home?
Yes, you must make arrangements for a responsible adult to take you home after your anesthetic or sedation. You will not be allowed to leave alone or drive yourself home. It is strongly suggested you have someone stay with you during the first 24 hours.

If you have local anesthesia only, with no sedation, it may be possible to go home without someone to accompany you. Check with your doctor first.

These instructions are important for your safety. If you do not follow your physician's instructions about not eating and having an adult take you home, your surgery may be canceled.