Body and biology
What Does Gastrointestinal (GI) Mean on a Label?
Gastrointestinal · say it: gas-troh-in-TES-tin-ulAlso written: GI, GI tract, digestive tract, gut, gastrointestinal tract
Short answer
Gastrointestinal (GI) means relating to the digestive tract: the mouth, esophagus, stomach and intestines.
What it means
Gastrointestinal, usually shortened to GI, refers to the digestive tract, the long tube that runs from the mouth through the esophagus (food pipe), stomach, small intestine and large intestine (colon) to the anus. The liver, gallbladder and pancreas are closely linked organs. GI symptoms include nausea, vomiting, indigestion, stomach pain, bloating, constipation and diarrhea.
You see the word on many medicine labels. 'GI adverse reactions' or 'GI upset' are among the most common side effects, which is why many leaflets suggest taking a medicine with food. More serious GI warnings, such as 'GI bleeding, ulceration and perforation' on NSAID labels, describe rare but important risks. Signs of GI bleeding, such as black, tarry stools or vomiting blood, need urgent medical help.
'Upper GI' usually means the esophagus, stomach and first part of the small intestine; 'lower GI' means the rest of the bowel. Gastroenterology is the medical specialty that deals with the GI tract.
Where you may see it
- The 'Adverse Reactions' section of most medicine labels
- Boxed warnings on NSAID labels
- Endoscopy, colonoscopy and gastroenterology reports
📄 How it looks on a report
The most common adverse reactions were gastrointestinal: nausea, diarrhea and abdominal pain.
🙅 What it does not mean
- 'Gastrointestinal side effects' usually means common, mild symptoms like nausea, not something dangerous.
- GI does not only mean the stomach; it covers the whole digestive tract.
- A serious GI warning on a label does not mean it will happen to you; it tells you which signs to act on.
🗒️ Questions to ask your doctor
💊 Medicines whose labels mention “Gastrointestinal”
Plain-English explanations of each medicine, from its official FDA label.
- Alendronate
a bisphosphonate, a medicine that slows the breakdown of bone by blocking cells called osteoclasts
- Amoxicillin
a penicillin-class antibacterial medicine that works against bacteria
- Ampicillin Sodium
a penicillin-type antibacterial medicine
- Colchicine
an alkaloid medicine, a compound obtained from the autumn crocus plant (colchicum autumnale)
- Ibuprofen
a nonsteroidal anti-inflammatory drug (NSAID), a type of medicine that reduces pain, swelling, and fever
- Liraglutide
a GLP-1 receptor agonist, a type of medicine that acts like a natural gut hormone called GLP-1 to help lower blood sugar
- Methotrexate
A dihydrofolate reductase inhibitor, a type of medicine that works against folate (a vitamin-like substance cells use to grow and divide). The FDA pharmacologic class is not listed on the label.
- Metoclopramide
A stomach and gut medicine. The label describes it as affecting how the stomach and intestines move. The label does not give an FDA drug class.
- Naproxen
a nonsteroidal anti-inflammatory drug (NSAID), which is a medicine that reduces pain, swelling, and inflammation
- Primaquine
An antimalarial medicine of the 8-aminoquinoline group, as described in the label
🔗 Read more from trusted sources
- “Gastrointestinal” on MedlinePlus ↗
US National Library of Medicine
- NCI Dictionary definition ↗
US National Cancer Institute: “gastrointestinal”
Seeing this word on your own report? Get every line of it explained, free.
Explain my report🧩 Related words
🔎 Look up another word
More words: body and biology
General information about a medical word, not advice about your own results. Ask the clinician who ordered the test what it means for you.