![]() (R/S)-ibuprofen | |
![]() (R)-ibuprofen | |
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Pronunciation | /ˈaɪbjuːproʊfɛn/ ⓘ, /aɪbjuːˈproʊfən/, eye-bew-PROH-fən |
Trade names | Brufen, 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),[2] 87% (rectal) |
Protein binding | 98%[3] |
Metabolism | Liver (CYP2C9)[3] |
Metabolites | ibuprofen glucuronide, 2-hydroxyibuprofen, 3-hydroxyibuprofen, carboxy-ibuprofen, 1-hydroxyibuprofen |
Onset of action | 30 min[4] |
Elimination half-life | 2–4 h[5] |
Excretion | Urine (95%)[3][6] |
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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 | 0.021g/L |
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Ibuprofen is a nonsteroidal anti-inflammatory drug (NSAID) that is used to relieve pain, fever, and inflammation.[7] This includes painful menstrual periods, migraines, and rheumatoid arthritis.[7] It can be taken orally (by mouth) or intravenously.[7] It typically begins working within an hour.[7]
Common side effects include heartburn, nausea, indigestion, and abdominal pain.[7] Potential side effects include gastrointestinal bleeding.[8] Long-term use has been associated with kidney failure, and rarely liver failure, and it can exacerbate the condition of people with heart failure.[7] At low doses, it does not appear to increase the risk of myocardial infarction (heart attack); however, at higher doses it may.[8] Ibuprofen can also worsen asthma.[8] While its safety in early pregnancy is unclear,[7] it appears to be harmful in later pregnancy, so it is not recommended during that period.[9] It works by inhibiting the production of prostaglandins by decreasing the activity of the enzyme cyclooxygenase (COX).[7] Ibuprofen is a weaker anti-inflammatory agent than other NSAIDs.[8]
Ibuprofen was discovered in 1961 by Stewart Adams and John Nicholson[10] while working at Boots UK Limited and initially sold as Brufen.[11] It is available under a number of brand names including Advil, Brufen, Motrin, and Nurofen.[7][12] Ibuprofen was first sold in 1969 in the United Kingdom and in 1974 in the United States.[7][11] It is on the World Health Organization's List of Essential Medicines.[13] It is available as a generic medication.[7] In 2022, it was the 33rd most commonly prescribed medication in the United States, with more than 17 million prescriptions.[14][15]
Stewart Adams and his associate John Nicholson invented a pharmaceutical drug known as 2-(4-isobutylphenyl) propionic acid.