How long does the dental block used to numb during Juvederm lip injection last?

Nerve blocks should last 2-3 hours, if longer, speak to your physician.  Rarely is there anything to worry about. Best, Dr. Emer.

By the time I post and you read the response if you are still anesthetic or numb, call the injecting MD urgently or go to ER.

Thank you for sharing your question.  In most cases lidocaine is used which can last between 45 minutes and 2 hours after injection, perhaps up to 3-4 if the lidocaine was combined with adrenaline.  If your physician used Marcaine instead of lidocaine you may have numbness for 6-8 hours after treatment.  Talk to your injector, they are your best source of information and reassurance.