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Dr. Varayu Prachayakul

Dr. Varayu Prachayakul

Bariatric Surgeon ·
, Bangkok, Thailand

20 Years of experience ·
Languages Spoken: Thai , English

Varayu Prachayakul is currently available for hospital consultations. Explore online consultation options or book an in-person visit.

About Dr. Varayu Prachayakul

Conditions treated by Dr. Varayu Prachayakul

Kindly have a look at the various conditions whose treatment is done by Dr. Varayu Prachayakul:

  • Gastrointestinal Bleeding
  • Jaundice
  • Abdominal Pain
  • Colon Cancer
  • Inflammatory Bowel Diseases
  • Crohn's Disease
  • Celiac Disease
  • Colon Cancer and Bowel Diseases
  • Pancreatitis
  • Rectal Cancer
  • Crohn's Disease Or Severe Diverticulitis
  • Liver Cancer
  • Bile Duct Cancer
  • Anal Cancer
  • Gastrointestinal Cancer
  • Pancreatic Cancer
  • Esophageal Varices
  • Ulcer

When you have gastroenterological problems, it can be a painful and distressing experience and especially so with sores on the stomach lining and small intestine and inflammation of the large intestine or pancreas. You must consult your Gastroenterologist in case of various gallbladder conditions as well as liver disease. We can safely state that if you have a disease or condition which is linked to the digestive system then the solution would be present with a doctor working in this specialty.

Signs and Symptoms treated by Dr. Varayu Prachayakul

The signs and symptoms of patients with a gastroenterological problem are:

  • Coeliac disease
  • Oesophageal discomfort
  • Bloating or abdominal pain
  • Loss of weight and appetite
  • Gallstones
  • Rectal bleeding/ blood in stool
  • Persistent heartburn/ GERD
  • Inflammatory bowel disease (IBD)
  • Vomiting
  • Pale coloured stools
  • Changes in bowel habits that are beginning to concern you
  • Bowel movements that are hard to control
  • Leakage/ stains in underwear
  • Lethargy
  • Urine of dark colour
  • Belching or excessive gas

When the occurrence of symptoms such as heartburn, diarrhea and constipation is more pronounced, it is a cause of worry and a pointer to more serious ramifications. If you are undergoing a chronic case of a Gastroenterological condition, you could experience more serious manifestation of symptoms such as yellowing of the skin and blood in the stool. It is wise to not ignore the signs for long lest they become serious and the severity of the illness becomes difficult to handle and treatment does not remain effective.

Operating Hours of a Gastroenterlogist

Monday to Saturday, 9 am to 5 pm are the operating hours of the doctor whereas Sunday is an off day. With a great track record in treating patients, the doctor is well respected in the field of Gastroenterology.

Popular Procedures performed by Dr Varayu Prachayakul

It is the following important popular procedures that the Dr. Varayu Prachayakul performs on the patients.:

  • Abdominoperineal Resection
  • Hemicolectomy
  • Endoscopy (UGI Endoscopy)

It is this doctor who manages the treatment of and also performs the right treatment of a wide range of gut related conditions in patients. It is only for testing and diagnoses that the doctor performs the procedures which cannot be called surgery but for surgical treatment you must visit or get referred to a gastrointestinal surgeon.

Qualification

  • MD Faculty of Medicine Siriraj Hospital, Mahidol University, Thailand, 1993

Work Experiences

  • Dr. Prachayakul, been working on advanced therapeutic endoscopy at Siriraj GI Endoscopy center, Siriraj hospital, Mahidol university.

Certifications (3)

  • Diploma of the Thai Board of General Medicine, Phramongkutklao Hospital, 2001
  • Diploma of the Thai Board of Gastroenterology, Siriraj Hospital, Mahidol University, Thailand, 2005
  • Certificate in Advanced Therapeutic Endoscopy and Endosonography, University Medical Center Hamburg-Eppendorf, Germany, 2008

Memberships (1)

  • Thai Board of Gastroenterology

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Procedures Performed

Abdominoperineal Resection
Adhesion Lysis
Cardiomyotomy
Endoscopy (UGI Endoscopy)
Foregut Surgery
Hemicolectomy
Hiatal Hernia Repair
Ileoanal Anastomosis (J-Pouch) Surgery
Laparoscopic Colon Resection
Laparoscopic Ventral Hernia Repair
Low Anterior Resection
Meckel's Diverticulectomy Treatment
Nissen Fundoplication
Pancreatectomy
Pancreatic Surgery
Partial Colectomy
Peroral Endoscopic Myotomy (POEM)
Proctectomy
Retroperitoneum Surgery
Robotic Hernia Surgery
Small Bowel Resection
Splenectomy
Stapled Hemorrhoidopexy
Subtotal Proctocolectomy
Total Colectomy

Frequently Asked Questions

Dr. Varayu Prachayakul is a specialized Gastroenterologist and is one of the most sought after doctors in Bangkok, Thailand.

No, this doctor does not offer telemedicine via MediGence

Dr. Varayu Prachayakul is one of the most sought after specialists in Thailand and has over 20 Years years of experience.

FAQ's Related to Gastroenterologist

The digestive system is a key part of the body and the conditions or health issues linked to it will get you a referral to a Gastroenterologist. When you first consult with the doctor, they will ask you the questions and recommend tests that will help gain a better understanding into the illness and its causes. The doctor handholds you through the treatment process, they manage it for and with you by making sure that your diet and lifestyle is in order and you are taking the right medications when and in the quantity that you should. A Gastroenterologist must have the knowledge of various factors such as:

  1. Gastrointestinal organs
  2. Movement of matter via intestines and stomach
  3. Digestion, absorption of nutrients
  4. Removal of body waste
  5. Liver system

Please do have a look at the various tests required prior to and during the consultation with a Gastroenterologist.:

  • Upper GI Series (barium swallow or barium meal)
  • Gastroscopy
  • pH Monitoring
  • Endoscopic Retrograde Cholangiopancreatography (ERCP)
  • Esophageal/Gastric Manometry
  • Endoscopic Ultrasound

These include Endoscopic ultrasounds, Gastroscopies and Colonoscopies and all of these procedures provide a good assessment of the condition at hand. An Endoscopy uses a camera inserted inside body via mouth through to esophagus with a thin and long tube to send back images which can help decipher symptoms. The difference between an endoscopy and a Colonoscopy, Sigmoidoscopy is that in these two the tube is inserted via rectum. Diagnostic imaging tests such as Computed tomography scan (CT or CAT scan), Magnetic resonance imaging (MRI) and Ultrasound are non invasive methods to understand the cause of the condition, confirm diagnoses and monitor the treatment response.

It is important for you to schedule regular visits to the Gastroenterologist if you are in the age bracket of 50 plus years and regular checkups for colorectal cancer are needed or the symptoms which show an imminent condition regards your digestive system or tract. You can even visit not just when you have symptoms which show a probable issue with the Gastrointestinal tract but when conditions are clear. Regular consultations with the doctor make it simpler for you to attain excellent digestive health post a surgery.

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Dr. Vishwas Kaushik
Reviewer

MBBS, MD

7 Years of Experience

Last Reviewed - June 2026

Dr. Vishwas Kaushik is a qualified medical professional holding an MBBS from the prestigious Belgorod State University, Russia, with a strong foundation in clinical medicine and healthcare practice. His comprehensive medical training has equipped him with a profound understanding of evidence-based clinical practices, patient-centered care, and the evolving landscape of modern medicine. With a keen interest in medical research and scientific communication, he consistently translates complex clinical concepts into clear, accurate, and accessible content for diverse audiences. His work reflects a deep commitment to advancing medical knowledge, delivering impactful healthcare insights, and bridging the gap between clinical expertise and accessible medical communication.
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Alvina Hasan
Author

M.Pharm

2 Year of Experience

Last Reviewed - June 2026

Alvina Hasan is a dedicated medical researcher and scientific writer with a strong foundation in pharmaceutical sciences. She holds a B.Pharm from Jamia Hamdard University and an M.Pharm in Quality Assurance from DIPSAR University.

With deep medical expertise and a strong interest in healthcare communication, she focuses on transforming complex clinical and scientific information into clear, engaging, and easy-to-understand narratives. She develops insightful healthcare articles and research-driven content designed to support both medical professionals and patients, helping bridge the gap between advanced medical knowledge and practical understanding.

Readers can explore her published research and articles here:

https://carcinogenesis.com/index.php/JOC/article/view/868

https://carcinogenesis.com/index.php/JOC/article/view/870

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