Hi, I am the mother of a 30 year old with autism. We've been through everything in the last 30 years and my son is thriving and working part time. My question is about dentistry. He has never been comfortable with the dentist so we've always done full sedation. We are now facing a tooth extraction which will not be under sedation. Does anyone have experience with anything that could calm him enough to sit for this? The doctor can do nitrous oxide, but I'm scared we may need a little more. What has anyone else used for this? Thanks so much for any help.