Nausea and vomiting

Dyspepsia

Haematemesis

Colonoscopy and sigmoidoscopy

Cirrhosis of the liver

Primary sclerosing cholangitis

Hereditary angioedema (HAE) and ACE inhibitor-induced angioedema

Acute porphyria

Primary biliary cirrhosis

Ulcerative colitis

Coeliac disease

Gastroscopy

Reactive arthritis

Peptic ulcer disease, Helicobacter pylori infection and chronic gastritis

Lactose intolerance

Giardiasis

Bariatric surgery (obesity surgery)

Crohn’s disease

Alkaline phosphatase (ALP)

Monitoring rheumatoid arthritis