Gastroscopy Procedure: Duration, Side Effects, and Post-Test Diet: A Complete Guide for Patients
Last update : 27 Fév 2026
In the modern diagnostic environment, gastroscopy has emerged as a vital tool for visual screening of the upper gastrointestinal tract. Doctors order a gastroscopy to investigate symptoms like chronic indigestion, heartburn, or to detect bleeding in the GI tract. In this blog, we are going to explore duration, side effects, and the post-test diet after a gastroscopy procedure.
A gastroscopy is a highly effective and accurate diagnostic procedure that helps identify issues associated with ulcers, inflammation, celiac disease, and certain types of cancer. The gastroscopy also enables medical professionals to take biopsy samples for further laboratory evaluation.
Now, let’s understand what a gastroscopy test or upper GI endoscopy is, which refers to the endoscopy of the upper gastrointestinal tract.
What Is a Gastroscopy Test?
A gastroscopy test is a diagnostic procedure where your upper part of the gut is checked using a camera by entering it through your throat. During a gastroscopy test, the screening is done in the upper gut, which consists of the gullet or esophagus, the stomach, and the first part of the small intestine, known as the duodenum.
The scope or camera used for this test is known as the gastroscope, which is passed through the mouth, down the esophagus.
Difference between Gastroscopy and Endoscopy
Here are the key differences between Gastroscopy and Endoscopy:
| Factors | Gastroscopy | Endoscopy |
| Scope of Examination | Particularly examines the GI tract | It can involve the examination of any organ and body part, depending on the type of endoscopy being performed. |
| Purpose | Mainly employed to diagnose and treat disorders of the upper GI tract | Not limited to diagnosing GI conditions. It can be used for therapeutic purposes. |
| Sedation | Usually performed using sedation | Sedation depends on the area of examination. It may or may not use sedation. |
| Biopsies and Treatment | Frequently involves taking biopsies and addressing issues such as bleeding ulcers. | It can be used to take biopsies and perform treatments like removing polyps or gallstones. |
Table: Gastroscopy vs. Endoscopy
When is a Gastroscopy Recommended by the Doctors?
A gastroscopy test may be ordered by doctors for symptoms such as:
- Recurring indigestion
- Recurring heartburn
- Frequent pain in the upper tummy
- Repeated vomiting
- Experiencing difficulty in swallowing
- Suspected ulcers
- Other symptoms related to the gut, stomach, or esophagus.
The Gastroscopy Procedure: Step-by-Step
Now, let’s look at the step-by-step gastroscopy procedure.
Pre-procedure Steps
The gastroscopy procedure is conducted as a day case in clinics. Which means it does not require staying overnight in the hospital. Before the gastroscopy procedure, the healthcare professionals will let you know how you should prepare for the procedure.
Let the medical team know if you take any blood-thinning medicines. The doctor will tell you whether you need to stop taking it for a while before the gastroscopy. Due to sedation, it is suggested that you bring someone who will take you home after the procedure.
Typically, patients are required to be on an empty stomach for at least six hours before the procedure. You can be permitted to have sips of water, but that too needs to be stopped two hours before the procedure. You will be asked whether you want to take a sedative or local anesthesia. The local anesthetic is a spray that numbs the area of your throat, while the sedative will make you drowsy and relaxed.
What Happens During the Procedure
A gastroscopy procedure using the numbing agent on the back of the throat. During the procedure, your vitals are constantly checked. The doctor will ask you to lie on your left side. After placing a guard to secure your teeth, a gastroscope will be inserted through your mouth. You will have to swallow to let the gastroscope pass into your esophagus and down towards your stomach.
As the scope passes down, the specialists will record the real-time image on a nearby screen. The scope will clearly show your organs. If required, doctors can use special forceps that are passed down the gastroscope to take biopsies.
Level of Discomfort to Expect After the Gastroscopy Procedure
After the gastroscopy, patients may experience a sore throat, which can last for a few days. If you have been sedated, you must not drive or operate machinery for at least 24 hours. You will not be able to consume food or drinks until the effects of the local anesthetic wear off.
What to Eat After Gastroscopy: Diet Recommendations
Many people still do not understand what to eat after a gastroscopy procedure. Here are the suggested dietary recommendations after a gastroscopy.
First Few Hours After the Sedation Wears Off
After the first few hours post-sedation, clear liquids such as water, herbal tea, or clear broths can be given. For throat relief, ice chips or honey in warm water can reduce soreness.
24-48 hours after the Gastroscopy Procedure
After a day or two, patients are recommended to give soft, bland, and easy-to-digest foods such as scrambled eggs, yogurt, bananas, mashed potatoes, oatmeal, white rice, and soups.
Foods to Avoid Temporarily
It is generally suggested to avoid spicy foods, acidic foods, alcohol, and carbonated drinks during the first 24 to 48 hours after the procedure.
When to call Your Doctor if eating causes discomfort
If the patient is experiencing discomfort like abdominal pain, persistent vomiting, high fever, or trouble swallowing upon eating, please communicate with your physician.
Gastroscopy Side Effects: What’s Normal and What’s Not
Gastroscopy generally does not show any side effects. Some symptoms are often observed after a gastroscopy. However, some gastroscopy side effects can be considered red flags and may require emergency medical attention.
Common Side Effects
- Sore throat
- Bloating
- Mild cramps
- Drowsiness after sedation
Recognizing Red Flags
- Persistent pain and discomfort. If the pain becomes severe, you may need medical attention.
- Minor bleeding during biopsies is considered normal and typically ceases on its own. However, prolonged bleeding requires medical attention.
- Chest pain and difficulty in breathing.
- Fever or signs of infection.
Benefits of Early Diagnosis Through Gastroscopy
One of the main benefits of early diagnosis through gastroscopy is accurate visualization and inspection of the GI tract. It can also help in detecting early-stage cancers in the esophagus and stomach. Furthermore, it also helps doctors to take tissue samples by biopsy and ensures targeted testing is conducted. It is also essential for diagnosing and monitoring conditions such as celiac disease and preventing long-term stomach damage.
Wrapping Up
The gastroscopy procedure is an important evaluation procedure that enables healthcare providers to assess issues in the GI tract. While performing the evaluation, the patient’s safety is always maintained as the top priority for any reputable gastroscopy clinic. The procedure is entirely non-invasive with minor side effects included. The recovery diet is also slowly required to be integrated into the daily lives of the patient. The patients need to communicate transparently with their healthcare providers during this procedure and ask them about their concerns. This information helps the healthcare team determine the most appropriate procedure and tailor the experience to the patient’s specific needs.
Consult a Certified Gastroscopy Clinic for a Thorough Screening!
Looking to get your gastroscopy test done? Seek advice from experienced healthcare providers and a certified gastroscopy clinic for a proper screening and start your treatment procedure.
Frequently Asked Questions (FAQs)
1. How long does a gastroscopy take?
Ans. A gastroscopy procedure typically takes 10 to 15 minutes, though it may take longer depending on the complexity of the case.
2. Will I gag during a Gastroscopy?
Ans. Yes, gagging is common due to the gag reflex in your throat. Doctors will use the local anesthetic to numb the area, which will help to reduce gagging.
3. Do I stay awake during the procedure?
Ans. If you are not using general anesthesia, you will stay awake. But if you need calming sedation, you can ask for it from your doctor.