I had some dental work done last week and the dentist had to give me more medicine halfway during the work. I also have to have the "laughing gas" due to my fear of the dentist. It didn't seem like it did what it was supposed to. One thing I did notice is I thought I would suffocate during this and had to continually pick up the mask to get air. This was the first time this has happened. I took a bottle of pain meds in just a few days afterwards and more due to the pain. Never had to do that before. Usually a motrin would help. I don't know either if one thing has to do with the other. I do know before I started the meds, when they would lay the chair back, I felt as though my tongue was covering my windpipe and I would struggle to get air but this time it did not happen. I was taking natural hormone treatments that seemed to work well, but since I started my meds, it seems like it is not kicking in like it was. I just don't know about all this.