Bromfenac

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Bromfenac
Bromfenac.svg
Names
Trade namesBromday, Xibrom, Prolensa, Yellox, others
  • 2-[2-amino-3-(4-bromobenzoyl)phenyl]acetic acid
Clinical data
Drug classNSAID[1]
Main usesPain after cataract surgery[1]
Side effectsRed eyes, itchy eyes, headache[1]
Pregnancy
category
  • US: C (Risk not ruled out)
Routes of
use
Eye drops
External links
AHFS/Drugs.comMonograph
MedlinePlusa611018
Legal
License data
Legal status
Pharmacokinetics
Protein binding99.8%
MetabolismCYP2C9
MetabolitesLactam, others
Elimination half-life1.4 hours in aqueous humour
Excretion82% urine, 13% faeces
Chemical and physical data
FormulaC15H12BrNO3
Molar mass334.169 g·mol−1
3D model (JSmol)
Melting point284 to 286 °C (543 to 547 °F) (bromfenac sodium·1.5H2O)
  • O=C(c1ccc(Br)cc1)c2cccc(c2N)CC(=O)O
  • InChI=1S/C15H12BrNO3/c16-11-6-4-9(5-7-11)15(20)12-3-1-2-10(14(12)17)8-13(18)19/h1-7H,8,17H2,(H,18,19) checkY
  • Key:ZBPLOVFIXSTCRZ-UHFFFAOYSA-N checkY
  (verify)

Bromfenac is a nonsteroidal anti-inflammatory drug (NSAID) which is used for pain and inflammation after cataract surgery.[1] It is used as an eye drop twice per day for two weeks.[1]

Common side effects include red eyes, itchy eyes, and headache.[1] Other side effects may include slower wound healing, bleeding, and keratitis.[1] It works by blocking the production of prostaglandins.[1]

Bromfenac was approved for medical use in the United States in 2005.[1] It is available as a generic medication.[2] In the United States 1.7 ml of 0.09% solution costs about 51 USD as of 2021.[2] In the United Kingdom 5 ml of the solution costs the NHS 8.5 pounds.[3]

Medical uses

Bromfenac is used for the treatment of postoperative ocular inflammation following cataract extraction.[4][5]

It reduces macular edema and thickness of the retina (an indicator for inflammation) and improve visual acuity after surgery.[6]

Contraindications

Bromfenac is contraindicated for people with adverse reactions to NSAIDs, such as asthma or rashes.[7][8]

Side effects

Bromfenac eye drops are generally well tolerated. Comparatively common side effects in clinical studies included abnormal sensations in eye (0.5% of people treated with bromfenac), mild to moderate erosion of the cornea (0.4%), eye pruritus (0.4%), eye pain (0.3%) and redness (0.3%). Serious side effects such as corneal perforation were not reported in studies but only during post-marketing in less than one patient in 1000.[7][8]

Interactions

No systematic interaction studies have been performed. There are no known cases of interactions with antibiotic eye drops.[7][8] Blood plasma levels remain very low during bromfenac therapy, so interactions with drugs taken by mouth are unlikely.

Pharmacology

Mechanism of action

As an NSAID, bromfenac works by inhibiting prostaglandin synthesis by blocking the cyclooxygenase (COX) enzymes. It preferably acts on COX-2 and only has a low affinity for COX-1.[8]

Pharmacokinetics

Bromfenac lactam, the main metabolite in urine

Bromfenac is well absorbed through the cornea and reaches highest concentrations in the aqueous humour after 150 to 180 minutes, with a biological half-life of 1.4 hours and high drug levels being maintained for at least 12 hours. It is mainly concentrated in the aqueous humour and conjunctiva, and much less in the lens and vitreous body.[7][8]

Concentrations in the blood plasma are too low to be measured quantitatively. 99.8% of the substance are bound to plasma proteins. The enzyme mainly responsible for metabolization of bromfenac is CYP2C9, and metabolites include the lactam and several conjugated compounds. 82% are excreted via the urine, and 13% via the faeces.[7][8]

The high degree of penetration and potency of bromfenac can be attributed to the halogenation of the molecule: by adding a bromine the NSAID becomes highly lipophilic which allows for rapid, sustained drug levels in the ocular tissues.[citation needed]

Chemistry

Along with indomethacin, diclofenac and others, bromfenac belongs to the acetic acid group of NSAIDs. It is used in form of bromfenac sodium · 1.5 H2O (CAS number: 120638-55-3 ), which is soluble in water, methanol and aqueous bases, insoluble in chloroform and aqueous acids, and melts at 284 to 286 °C (543 to 547 °F) under decomposition.[9]

History

For ophthalmic use, bromfenac has been prescribed more than 20,000,000 times across the world.[8] As an eye drop, it has been available since 2000, starting in Japan where it was sold as Bronuck.[10] It was first FDA approved for use in the United States in 2005, and it was marketed as Xibrom, twice-daily.[11] In October 2010 Bromday received FDA approval as a new, once-daily formulation.[citation needed] More recently, in 2013, Prolensa has also been approved by the FDA.[11] Bromfenac eye drops have been marketed in the European Union since 2011,[8] and are available on worldwide markets with agreements from Bausch & Lomb,[8] Croma-Pharma, and other companies.[citation needed]

Bromfenac was formerly marketed in the United States by Wyeth-Ayerst in an oral formulation called Duract for short-term relief of pain (less than 10 days at a time). It was brought to market in July 1997, and was withdrawn 22 June 1998, following numerous reports of hepatotoxicity in patients who had taken the medication for longer than the recommended 10-day period.[12][13]

Society and culture

Cost

Bromfenac ophthalmic ophthalmic solution in the U.S. of 1.7 milliliters, goes for about $130 (USD)[14]

References

  1. 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 "Bromfenac Monograph for Professionals". Drugs.com. Retrieved 17 July 2021.
  2. 2.0 2.1 "Bromfenac Prices, Coupons & Savings Tips - GoodRx". GoodRx. Retrieved 17 July 2021.
  3. BNF (80 ed.). BMJ Group and the Pharmaceutical Press. September 2020 – March 2021. p. 1241. ISBN 978-0-85711-369-6.CS1 maint: date format (link)
  4. "Yellox EPAR". European Medicines Agency (EMA). Retrieved 23 November 2020.
  5. "Prolensa- bromfenac sodium solution/ drops". DailyMed. 1 March 2020. Retrieved 23 November 2020.
  6. Sheppard JD (2016). "Topical bromfenac for prevention and treatment of cystoid macular edema following cataract surgery: a review". Clinical Ophthalmology. 10: 2099–2111. doi:10.2147/OPTH.S86971. PMC 5087782. PMID 27822006.
  7. 7.0 7.1 7.2 7.3 7.4 Haberfeld H, ed. (2015). Austria-Codex (in German). Vienna: Österreichischer Apothekerverlag.CS1 maint: unrecognized language (link)
  8. 8.0 8.1 8.2 8.3 8.4 8.5 8.6 8.7 8.8 "Yellox Summary of Product Characteristics" (PDF). European Medicines Agency. 11 January 2016.
  9. Dinnendahl V, Fricke U, eds. (2012). Arzneistoff-Profile (in German). 2 (26 ed.). Eschborn, Germany: Govi Pharmazeutischer Verlag. ISBN 978-3-7741-9846-3.CS1 maint: unrecognized language (link)
  10. "Ethical Products for Medical Professionals". Senju Pharmaceutical. Retrieved 11 December 2016.
  11. 11.0 11.1 FDA Professional Drug Information for Xibrom.
  12. Hunter EB, Johnston PE, Tanner G, Pinson CW, Awad JA (August 1999). "Bromfenac (Duract)-associated hepatic failure requiring liver transplantation". The American Journal of Gastroenterology. 94 (8): 2299–301. PMID 10445569.
  13. "Duract (bromfenac) Information". FDA. Retrieved 11 December 2016.
  14. "Bromfenac ophthalmic Prices, Coupons & Patient Assistance Programs". Drugs.com. Retrieved 25 March 2021.

External links

Identifiers:
  • "Bromfenac". Drug Information Portal. U.S. National Library of Medicine.
  • "Bromfenac sodium". Drug Information Portal. U.S. National Library of Medicine.