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Pronunciation | /ˈaɪbjuːproʊfɛn/, /aɪbjuːˈproʊfən/, EYE-bew-PROH-fən |
Trade names | Advil, Motrin, Nurofen, others |
Other names | isobutylphenylpropionic acid |
AHFS/Drugs.com | Monograph |
MedlinePlus | a682159 |
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Routes of administration | By mouth, rectal, topical, intravenous |
Drug class | Nonsteroidal anti-inflammatory drug (NSAID) |
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Pharmacokinetic data | |
Bioavailability | 80–100% (oral),[3] 87% (rectal) |
Protein binding | 98%[4] |
Metabolism | Liver (CYP2C9)[4] |
Metabolites | ibuprofen glucuronide, 2-hydroxyibuprofen, 3-hydroxyibuprofen, carboxy-ibuprofen, 1-hydroxyibuprofen |
Onset of action | 30 min[5] |
Elimination half-life | 2–4 h[6] |
Excretion | Urine (95%)[4][7] |
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ECHA InfoCard | 100.036.152 |
Chemical and physical data | |
Formula | C13H18O2 |
Molar mass | 206.285 g·mol−1 |
3D model (JSmol) | |
Chirality | Racemic mixture |
Density | 1.03 g/cm3 |
Melting point | 75 to 78 °C (167 to 172 °F) |
Boiling point | 157 °C (315 °F) at 4 mmHg |
Solubility in water | 0.021 mg/mL (20 °C) |
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Ibuprofen is a nonsteroidal anti-inflammatory drug (NSAID) that is used to relieve pain, fever, and inflammation.[8] This includes painful menstrual periods, migraines, and rheumatoid arthritis.[8] It may also be used to close a patent ductus arteriosus in a premature baby.[9][8] It can be taken orally (by mouth) or intravenously.[8] It typically begins working within an hour.[8]
Common side effects include heartburn, nausea, indigestion, and abdominal pain.[8] As with other NSAIDs, potential side effects include gastrointestinal bleeding.[10] Long-term use has been associated with kidney failure, and rarely liver failure, and it can exacerbate the condition of patients with heart failure.[8] At low doses, it does not appear to increase the risk of heart attack; however, at higher doses it may.[10] Ibuprofen can also worsen asthma.[10] While its safety in early pregnancy is unclear,[8] it appears to be harmful in later pregnancy, so it is not recommended during that period.[11] Like other NSAIDs, it works by inhibiting the production of prostaglandins by decreasing the activity of the enzyme cyclooxygenase (COX).[8] Ibuprofen is a weaker anti-inflammatory agent than other NSAIDs.[10]
Ibuprofen was discovered in 1961 by Stewart Adams and John Nicholson[12] while working at Boots UK Limited and initially marketed as Brufen.[13] It is available under a number of brand names including Advil, Motrin, and Nurofen.[8][14] Ibuprofen was first marketed in 1969 in the United Kingdom and in 1974 in the United States.[8][13] It is on the World Health Organization's List of Essential Medicines.[15] It is available as a generic medication.[8] In 2022, it was the 33rd most commonly prescribed medication in the United States, with more than 17 million prescriptions.[16][17]
Stewart Adams and his associate John Nicholson invented a pharmaceutical drug known as 2-(4-isobutylphenyl) propionic acid.