What side effects are common with indomethacin?
Indomethacin (an NSAID) commonly causes gastrointestinal side effects. These can include stomach pain or upset, heartburn, nausea, and diarrhea. NSAIDs also frequently raise the risk of gastritis and stomach/intestinal bleeding, especially with higher doses or longer use. [1]
What serious indomethacin side effects should people watch for?
Seek urgent medical care if symptoms suggest bleeding, severe allergic reaction, or serious organ problems. High-concern signs include:
- Vomiting blood or material that looks like coffee grounds, black/tarry stools (possible GI bleeding) [1]
- Severe stomach pain or persistent vomiting (possible GI complications) [1]
- Signs of an allergic reaction such as swelling of the face or throat, wheezing, or trouble breathing (possible hypersensitivity) [1]
- Chest pain, weakness on one side of the body, trouble speaking, sudden vision changes (possible cardiovascular or neurologic events) [1]
- Severe skin reactions, such as blistering or peeling skin (rare but serious) [1]
Who is at higher risk for indomethacin side effects?
Risk is higher in people with certain baseline conditions and those using it in ways that increase NSAID exposure, such as:
- History of stomach ulcers or GI bleeding [1]
- Older age (more vulnerability to GI and kidney effects) [1]
- Higher doses or prolonged use [1]
- Concurrent use of other medicines that raise bleeding risk (for example, blood thinners or other NSAIDs) [1]
What does indomethacin do to the stomach and intestines?
Like other NSAIDs, indomethacin can irritate the stomach lining and reduce protective prostaglandins. This increases the risk of ulcers and GI bleeding. These risks go up with dose and duration. [1]
Can indomethacin affect kidneys or fluid balance?
Yes. NSAIDs can reduce blood flow to the kidneys, which may worsen kidney function or cause fluid retention. This risk is greater in people with existing kidney disease, dehydration, heart failure, or use of other medicines that affect kidney function. [1]
Does indomethacin have cardiovascular risks?
NSAIDs can increase cardiovascular risk in some patients, including risk of serious events such as heart attack or stroke. This risk can be higher with longer use and higher doses. [1]
What patient questions come up most often?
People often ask whether they should stop indomethacin if they get stomach pain, black stools, or signs of allergy. Those symptoms can signal bleeding or a serious reaction, and they should get urgent medical attention rather than waiting. [1]
What are safer ways to reduce risk (without changing the prescription on your own)?
Follow the prescriber’s dosing instructions and avoid doubling up with other NSAIDs unless your clinician tells you to. If you’re at higher GI risk, your prescriber may recommend protective strategies, such as using the lowest effective dose for the shortest time. If you have risk factors (ulcer history, older age, kidney disease, or blood thinners), discuss them before continuing. [1]
Sources
[1] https://www.drugs.com/indomethacin.html