Gastrointestinal Treatment Guidelines

Introduction

Gastrointestinal treatment guidelines aim to provide evidence-based recommendations for the management of gastrointestinal disorders, with a focus on pharmacological, dietary, and multidisciplinary interventions, as recommended by the American Gastroenterological Association and the American College of Gastroenterology 1

H. pylori eradication is an efficacious treatment with strong evidence, and is recommended as a first-line therapy for patients with H. pylori infection, with high-quality evidence supporting its efficacy 1
Proton pump inhibitors (PPIs) at standard dose (e.g., omeprazole 20mg daily) are recommended for H. pylori-negative patients or those with persistent symptoms after eradication, with strong recommendation and high-quality evidence 1
PPIs at standard dose are also recommended for patients with epigastric pain predominant symptoms, with strong recommendation and high-quality evidence 1
Prokinetic agents (e.g., acotiamide, itopride, mosapride) are recommended for patients with fullness, bloating, and early satiety predominant symptoms, with weak recommendation and moderate evidence 1
Tricyclic antidepressants (TCAs) are recommended as second-line therapy, with strong recommendation and moderate-quality evidence, starting with low dose (e.g., amitriptyline 10mg once daily) and titrating slowly to maximum of 30-50mg once daily 1
Antipsychotics (e.g., sulpiride, levosulpiride) and histamine-2 receptor antagonists are alternative second-line options, with weak recommendation and low-quality evidence 1

Eating small, frequent meals (4-6 times a day) is recommended to help manage symptoms, with moderate evidence 2
Eating slowly and chewing food thoroughly (at least 15 times per bite) is recommended to help reduce symptoms, with moderate evidence 2
Separating liquids from solids (waiting 15 minutes before and 30 minutes after meals to drink) is recommended to help manage symptoms, with moderate evidence 2
Ensuring adequate hydration (at least 1.5L of fluids daily) is recommended to help manage symptoms, with moderate evidence 2
Avoiding carbonated beverages, foods high in simple sugars, and trigger foods is recommended to help manage symptoms, with moderate evidence 2, 1
Including yogurt, preferably low-lactose or lactose-free, in the diet is recommended to help manage symptoms, with moderate evidence 2
A low FODMAP diet is considered, with a weak recommendation and very low-quality evidence, for patients with persistent symptoms despite other interventions 1

Involvement of a multidisciplinary support team, including gastroenterologists, psychologists, and dietitians, is strongly recommended for patients with severe anxiety and refractory functional dyspepsia symptoms, with high-quality evidence supporting its efficacy 1
Early dietitian involvement is recommended to avoid overly restrictive diet, with moderate evidence 1
Regular aerobic exercise is recommended, with strong recommendation, to help reduce anxiety symptoms, with high-quality evidence supporting its efficacy 1

Patients with weight loss and food restriction should be assessed for eating disorders, with moderate evidence 1
For patients ≥60 years with abdominal pain and weight loss, an urgent abdominal CT should be performed to exclude pancreatic cancer, as recommended by the American Gastroenterological Association, with high-quality evidence supporting its efficacy 1
For patients ≥55 years, a full blood count is recommended, and for patients with overlapping IBS symptoms, coeliac serology is recommended, with moderate evidence 1
Non-invasive H. pylori testing is recommended before endoscopy for most patients without alarm features, as recommended by the American College of Gastroenterology, with high-quality evidence supporting its efficacy 1

Opioids and surgery should be avoided as they can worsen outcomes and cause iatrogenic harm, with strong evidence 1
Avoid routine use of gastric emptying testing, 24-hour pH monitoring, and opioids, as they can worsen outcomes and cause iatrogenic harm, with moderate evidence 1
Overuse of endoscopy in the absence of alarm features, especially in typical FD patients under 55 years, has low yield, with moderate evidence 1

Referral to gastroenterology is appropriate when diagnostic uncertainty exists, symptoms are severe or refractory to first-line treatments, or the patient requests a specialist opinion, with moderate evidence 1
Failure to explain the diagnosis properly and establish an effective doctor-patient relationship is crucial, with moderate evidence 1