I am getting two fillings soon. I have always used the laughing gas in all the dental works that I have had in the past without any problems. However, the last time I had the Nitrous gas, I got lightheadedness then fall asleep for a few minutes or so, and when I woke up, the gas does not seem to have any effect on me anymore.
Is this a normal effect of the nitrous oxide or is it a problem? Has anyone else experienced this? I am somewhat concerned that I will experience this again with the laughing gas when I get the fillings done. I would be grateful for any input.