This MedLibrary.org supplementary page on Zafirlukast is provided directly from the open source Wikipedia as a service to our readers. Please see the note below on authorship of this content, as well as the Wikipedia usage guidelines. To search for other content from our encyclopedia supplement, please use the form below:
Related Sponsors
 |
|
 |
|
|
Zafirlukast
|
|
| Systematic (IUPAC) name | |
| cyclopentyl N-[3-{[2-methoxy-4-[(2-methylphenyl) sulfonylcarbamoyl]phenyl]methyl}-1-methyl-indol-5-yl] carbamate |
|
| Identifiers | |
| CAS number | |
| ATC code | R03 |
| PubChem | |
| DrugBank | |
| Chemical data | |
| Formula | C31H33N3O6S |
| Mol. mass | 575.676 g/mol |
| Pharmacokinetic data | |
| Bioavailability | Unknown |
| Protein binding | 99% |
| Metabolism | Hepatic (CYP2C9-mediated) |
| Half life | 10 hours |
| Excretion | Biliary |
| Therapeutic considerations | |
| Pregnancy cat. | |
| Legal status | |
| Routes | Oral |
Zafirlukast is an oral leukotriene receptor antagonist (LTRA) for the maintenance treatment of asthma, often used in conjunction with an inhaled steroid and/or long-acting bronchodilator. It is available as a tablet and is usually dosed twice daily. Another leukotriene receptor antagonist is montelukast (Singulair), taken once daily, and Zyflo, taken four times per day.
Zafirlukast blocks the action of the cysteinyl leukotrienes on the CysLT1 receptors, thus reducing constriction of the airways, build-up of mucus in the lungs and inflammation of the breathing passages.
Zafirlukast is marketed by Astra-Zeneca with the brand names Accolate, Accoleit, and Vanticon. It was the first LTRA to be marketed in the USA and is now approved in over 60 countries, including the UK, Japan, Italy, Spain, Canada, Brazil, China and Turkey.
A letter was submitted to the FDA by Zeneca Pharmaceuticals on July 22, 1997, notifying them of a change in product labeling that includes the following potential reaction in patients undergoing a dosage reduction of oral steroids who are currently taking zafirlukast:
PRECAUTIONS-Eosinophilic Conditions: The reduction of the oral steroid dose, in some patients on ACCOLATE therapy, has been followed in rare cases by the occurrence of eosinophilia, vasculitic rash, worsening pulmonary symptoms, cardiac complications, and/or neuropathy sometimes presenting as Churg Strauss Syndrome, a systemic eosinophilic vasculitis. Although a causal relationship with ACCOLATE has not been established, caution is required when oral steroid reduction is being considered.1
1- http://www.fda.gov/medWatch/safety/1997/accola.htm
External links
- Accolate, Accoleit, Vanticon (manufacturer's website)
- Zafirlukast (patient information)
|
|||||||||||||||||||||||||||||||||||||
 |
This pharmacology-related article is a stub. You can help Wikipedia by expanding it. |
Wikipedia content modification information:
- This page was last modified on 1 October 2008, at 04:05.
Wikipedia Authorship and Review
Wikipedia content provided here is not reviewed directly by MedLibrary.org. Wikipedia content is authored by an open community of volunteers and is not produced by or in any way affiliated with MedLibrary.org.
Wikipedia Usage Guidelines
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article on "Zafirlukast".
The URL for this specific entry is:
All Wikipedia text is available under the terms of the GNU Free Documentation License. (See Copyrights for details). Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc.