What is indomethacin? How is indomethacin used?
Indomethacin is a nonsteroidal anti-inflammatory drug (NSAID) that reduces fever, pain and inflammation. It is similar to ibuprofen (Motrin) and naproxen (Naprosyn, Aleve). Indomethacin works by reducing the production of prostaglandins. Prostaglandins are chemicals that the body produces and which cause the fever and pain that are associated with inflammation. What is indomethacin blocks the enzymes that make prostaglandins (cyclooxygenase 1 and 2) and thereby reduces the levels of prostaglandins. As a result, fever, pain and inflammation are reduced. Indomethacin is available in an extended release form. The FDA first approved indomethacin in January 1965.

Some individuals are allergic to NSAIDs and may develop shortness of breath when an NSAID is taken. People with asthma are at a higher risk for experiencing serious allergic reaction to NSAIDs. Individuals with a serious allergy to one NSAID are likely to experience a similar reaction to a different NSAID.
What is indomethacin may cause ulceration of the stomach or intestine, and the ulcers may bleed. Sometimes, ulceration may lead to perforation of the intestine and bleeding can occur without abdominal pain, and black tarry stools, weakness, and dizziness upon standing (orthostatic hypotension) may be the only signs of a ulceration.

NSAIDs can reduce the ability of blood to clot thereby increasing bleeding after an injury. NSAIDs reduce the flow of blood to the kidneys and impair function of the kidneys. The impairment is most likely to occur in patients with preexisting impairment of kidney function or congestive heart failure, and use of NSAIDs in these patients should be done cautiously. Individuals who have nasal polyps or are allergic to aspirin or other NSAIDs should not use indomethacin because there is an increased risk of severe allergic reactions in these individuals.