I couldn't recall the kind of shot that I gotten at the hospital for my dizziness & drunk feeling. I was given a shot and told to wait for at least 20 - 30 minutes before leaving. And before I left emergency room my left ear stop ringing. I asked the nurse what it was that was given to me. She told me, though I asked her to write it down. She said that there's only One, so you won't forget it, Well I did. A friend that has had experience in the medical field said they believe it was this... "Serotonin". So I'm asking ???