Is it possible to be allergic to local anesthesia, as in stop breathing? I remember I stopped breathing and my dentist giving me another shot of something to revive me, a second after the shot I remember taking a couple of very deep breaths. When three weeks later I asked him which anesthesia I am allergic to he said none, when I asked him what happened that day he said nothing, I explained what I experienced and he said "you dreamt it." Then he told me that I would be the first in the world to stop breathing under local anesthesia, short of having a fever over 105 and being under 9 (none of which are the case.) Generally, I do know that I have problems with memory--I can't remember where I parked my car and have to stop and think, I walk into a room and have to stop and think why I'm there, etc. However, I have been till now able to distinguish between "dreaming" and "reality". Is it possible to hallucinate under local anesthesia in which case is this an allergic reaction? Or is it possible that the first thing happened? I remember him saying "she's not breathing. Give me the ..." And then after the shot I took the deep breaths, coming out of my haze I remember him saying, "You'll be alright" and he walked out of the room and one of the office staff came in to talk to me about the bill. And so, a day after my conversation with him, I am left wondering: "Did I hallucinate?" I didn't dream it. You can't answer these questions, but you can answewr the questions re: probability of reacting to the anesthesia as I did. There's nothing in my chart re: this incident.