Not fully asleep, not fully awake — the in-between state explained.
Twilight sedation, or conscious sedation, uses medication to help you relax during a medical procedure. Unlike general anesthesia, it does not require a breathing tube. You remain awake enough to respond to your doctor, but you will feel very drowsy. Most patients find the experience comfortable and feel little anxiety while it is happening.
The medication is usually given through an intravenous line directly into your vein. You will likely feel heavy and deeply relaxed within minutes. While you are not technically asleep, you probably will not remember the procedure afterward. This is because the drugs cause a temporary period of anterograde amnesia, meaning your brain does not form new memories during the sedation.
Your care team closely tracks your vital signs throughout the entire process. A nurse or anesthesiologist watches your heart rate, blood pressure, and oxygen levels constantly. Because you can still breathe on your own, the recovery process is generally faster than with full anesthesia. We keep you in the recovery area until you are fully alert and stable.
Even after you wake up, the sedative remains in your system for several hours. You cannot drive, operate machinery, or make important legal decisions for the rest of the day. You must arrange for a responsible adult to drive you home after your appointment. Plan to rest for the remainder of the day as your body processes the medications.