This involves medication being given to you through an IV line that makes you fall asleep. Once you are asleep, your anaesthetist will insert a breathing tube into your throat through your mouth. You may be kept asleep with a special gas that you breathe through the tube, or with the anaesthetic medicine being given through the IV line throughout the operation. The anaesthetist will turn off either the medicine or the gas at the end of the case and as you wake up, take the breathing tube out. Common risks of this type of anaesthetic include a sore throat or nausea and vomiting when you wake up. Rarer risks include damage to your teeth if the tube is difficult to put into the correct place and allergic reactions to the anaesthetic medications.