methylxanthines

meth·yl·xan·thines

(meth'il-zan'thinz),
A chemical group of drugs derived from xanthine (a purine derivative); members of the group include theophylline, caffeine, and theobromine.

methylxanthines

a group of alkaloids that includes caffeine and related substances. Ingested caffeine is rapidly metabolized in the liver to three dimethylxanthines: paraxanthine, theophylline and theobromine; these are released in the plasma and remain in the circulation while caffeine concentration declines. As caffeine and its metabolites are often present at the same time, it is difficult to resolve which tissues are directly or indirectly affected by which compound.
References in periodicals archive ?
Ilex paraguariensis extracts are an important source of polyphenols, methylxanthines (9) and saponins (8).
Methylxanthines are the psychopharmacologically active constituents of chocolate.
The animal studies have demonstrated that caffeine and other methylxanthines, albeit at high doses, reduced body weight and body fat by both anorectic and thermogenic stimulations11.
Use bronchodilators, steroids, anticholinergics, methylxanthines, mucolytics, and/or hydrating agents when indicated.
Phenolic compounds, saponins, methylxanthines, sugars and vitamins occurs in yerba-mate (Jacques, Santos, Dariva, Oliveira, & Caramao, 2007; Heck & de Mejia, 2007; Burris et al.
USPRwire, Sun Oct 18 2015] Energy drinks are a category of non-alcoholic beverages that contain stimulants such as caffeine in combination with numerous other ingredients such as taurine, methylxanthines, amino acids, herbal extracts, and vitamin B, which provide consumers with an energy boost.
The thermogenic and fat-oxidizing potential of varied bioactive food ingredients such as methylxanthines, polyphenols, capsaicinoids/capsinoids, minerals, proteins/ amino acids, carbohydrates/sugars and fats/fatty acids have been recognized.
The Composition of Polyphenols and Methylxanthines in Teas and Herbal Infusions.
Bronchodilators (Beta-adrenergics, methylxanthines, or anticholinergics) may be valuable in patients in whom there is airway obstruction with a bronchospasm.
Theophylline, theobromine and caffeine existing in tea are among the type of methylxanthines that are found in almost all types of teas.