Getmedicin.org

Methylxanthine





Xanthine - Wikipedia, the free encyclopedia

9/22/2014
06:11 | Author: Tyler James

Methylxanthine
Xanthine - Wikipedia, the free encyclopedia

Methylated xanthines (methylxanthines), which include caffeine, aminophylline, IBMX, paraxanthine, pentoxifylline, theobromine, and theophylline, affect not.

Methylated xanthines (methylxanthines), which include caffeine, aminophylline, IBMX, paraxanthine, pentoxifylline, theobromine, and theophylline, affect not only the airways but stimulate heart rate, force of contraction, cardiac arrhythmias at high concentrations. In high doses they can lead to convulsions that are resistant to anticonvulsants. Methylxanthines induce acid and pepsin secretions in the GI tract. Methylxanthines are metabolized by cytochrome P450 in the liver.

3,7-Dihydropurine-2,6-dione 1 H -Purine-2,6-dione c1c2c(n1)nc(nc2O)O.

proc, drug ( R1 / 2 / 3 / 5 / 6 / 7 ) M : MET.

noco ( c, p )/ cong / tumr, sysi / epon, injr.

These drugs act as both:

Derivatives of xanthine (known collectively as xanthines ) are a group of alkaloids commonly used for their effects as mild stimulants and as bronchodilators, notably in the treatment of asthma symptoms.

Comments (1)Read more



Methylxanthines for COPD Uses, Side Effects, and More - WebMD

7/21/2014
04:18 | Author: Hannah Ramirez

Methylxanthine
Methylxanthines for COPD Uses, Side Effects, and More - WebMD

Drug details for Methylxanthines for chronic obstructive pulmonary disease (COPD).

McIvor RA, et al. (2011). COPD, search date April 2010. Online version of BMJ Clinical Evidence: http://www.clinical evidence.com.

Talk to health experts and other people like you in WebMD's Communities. It's a safe forum where you can create or participate in support groups and discussions about health topics that interest you. WebMD Second Opinion munities.

Medicine is one of the many tools your doctor has to treat a health problem. Taking medicine as your doctor suggests will improve your health and may prevent future problems.

Comments (2)Read more

Methylxanthines

5/20/2014
02:27 | Author: Sarah Gray

Methylxanthine
Methylxanthines

Compare methylxanthines. Includes user reviews and ratings for individual medications. Find related monographs and prescribing information.

Methylxanthines act as bronchodilators by relaxing bronchial smooth muscle and helps the constricted airways to dilate. The exact mechanism of action with regards to methylxanthine causing bronchodilatation is not well understood but it appears that methylxanthines inhibit the enzyme phosphodiesterase, which degrades cyclic AMP, so methylxanthines tend to increase the concentration of cyclic AMP.

Medical conditions associated with methylxanthines: More FDA updates... More.

provides accurate and independent information on more than 24,000 prescription drugs, over-the-counter medicines and natural products. This material is provided for educational purposes only and is not intended for medical advice, diagnosis or treatment.

Terms of Use · Privacy Policy.

Methylxanthines are bronchodilators used in the treatment of asthma and chronic obstructive pulmonary disease (COPD).

A drug may be classified by the chemical type of the active ingredient or by the way it is used to treat a particular condition. Each drug can be classified into one or more drug classes.

Data sources include Micromedex (updated Sep 26th, 2014), Cerner Multum (updated Oct 16th, 2014), Wolters Kluwer (updated Oct 9th, 2014) and others. To view content sources and attributions, refer to our editorial policy.

We comply with the HONcode standard for trustworthy health information. Verify here.

Follow: Google+ Facebook Twitter YouTube RSS.

Comments (0)

Methylxanthine (drug) -- Encyclopedia Britannica

3/19/2014
12:16 | Author: Emily Peterson

Methylxanthine
Methylxanthine (drug) -- Encyclopedia Britannica

The methylxanthines are even milder stimulants. Unlike the amphetamines and methylphenidate, which are synthetically manufactured, these compounds occur.

Or click Continue to submit anonymously:

What made you want to look up methylxanthine?

While every effort has been made to follow citation style rules, there may be some discrepancies. Please refer to the appropriate style manual or other sources if you have any questions.

Comments (0)

Methylxanthines in asthma

1/18/2014
02:15 | Author: Sarah Gray

Methylxanthine
Methylxanthines in asthma

Methylxanthines represent a unique class of drugs for the treatment of asthma. The methylxanthine theophylline has demonstrated efficacy in attenuating the.

Generate a file for use with external citation management software.

Methylxanthines represent a unique class of drugs for the treatment of asthma. The methylxanthine theophylline has demonstrated efficacy in attenuating the three cardinal features of asthma - reversible airflow obstruction, airway hyperresponsiveness, and airway inflammation. At doses achieving relatively high serum levels in which toxic side effects are sometimes observed, direct bronchodilatory effects of theophylline are recognized. At lower serum concentrations, theophylline is a weak bronchodilator but retains its capacity as an immunomodulator, anti-inflammatory, and bronchoprotective drug. Intense investigation into the molecular mechanisms of action of theophylline has identified several different points of action. Phosphodiesterase inhibition and adenosine receptor antagonism have both been implicated in promoting airway smooth muscle relaxation and bronchodilation. Similar mechanisms of action may explain the inhibitory effects of theophylline on immune cells. At lower concentrations that fail to inhibit phosphodiesterase, effects on histone deacetylase activity are believed to contribute to the immunomodulatory actions of theophylline. Since anti-inflammatory and immunomodulatory effects of methylxanthines are realized at lower serum concentrations than are required for bronchodilation, theophylline's predominant role in asthma treatment is as a controller medication for chronic, persistent disease.

National Center for Biotechnology Information, U.S. National Library of Medicine 8600 Rockville Pike, Bethesda MD, 20894 USA.

Warning: The NCBI web site requires JavaScript to function. more.

Comments (0)