What happens during a gastroscopy
On the day of the gastroscopy you’ll need to stop eating at least 6 hours before the test.
You may be able to have small sips of water. Your letter will give you more details about eating and drinking on the day.
You should bring along the details of medicines you take. Follow any instructions the hospital gives you about taking medicines.
When you arrive
You'll speak with a nurse about what's going to happen. They’ll ask some questions about your health and medical history.
You may be offered something to make you more comfortable and make the test easier, such as:
- local anaesthetic spray – to numb the back of your mouth and inside of your throat
- sedation – medicine given through a small tube in your arm to help you relax
Important
You must not drive for 24 hours if you have sedation. Someone will need to pick you up from hospital in a car or taxi.
Giving consent
A nurse or specialist will explain possible risks.
In rare cases, people may:
- have a reaction to the sedation
- have some bleeding afterwards
- have an infection after the procedure
You'll be asked to sign a consent form. This is to confirm you understand the risks and agree to have the procedure.
It's important to remember these things are rare. If anything happens, the team will take care of you.
The procedure
It should take 15 to 45 minutes to have your gastroscopy.
But you might be at the hospital for around 4 hours from the time you get there until you go home.
| What happens | What it might feel like |
|---|---|
| A thin, flexible tube with a small camera inside goes into your mouth and down your throat into your stomach | You may feel like you want to be sick. This should stop once the tube reaches your stomach. Sedation can help prevent this |
| Air is pumped in to inflate your stomach | You may feel bloated and might burp a few times |
| A sample of cells may be taken | You will not feel anything if this happens |
A gastroscopy should not be painful. But you can ask for the procedure to be stopped at any time.
After a gastroscopy
After the gastroscopy is finished you will be moved to a recovery room.
You should be able to go home as soon as you feel well enough to. For most people, this will be within a few hours.
If you have sedation, you’ll need someone to take you home and stay with you for 24 hours.
You should also avoid doing any of the following for 24 hours after sedation:
- drinking alcohol
- driving
- operating machinery
- signing important documents
If you have a local anaesthetic spray you should wait an hour before eating or drinking.
You may have some stomach and throat pain after a gastroscopy. This is normal and should pass in a few hours.
Urgent advice: Call 111, or the hospital where you had a gastroscopy, if:
You have any of these things after a gastroscopy:
- a high temperature, or you feel hot or shivery
- poo that’s dark or black, like tar
- shortness of breath
- you keep being sick
Immediate action required: Call 999 or go to your nearest A&E department if:
- you’re vomiting blood
- you have severe stomach or chest pain, or stomach or chest pain that gets worse
Do not drive to A&E. Ask someone to drive you or call 999 and ask for an ambulance.
Bring any medicines you take with you.
Page last reviewed: 07 April 2022
Next review due: 07 April 2025