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Theophylline. Theophylline, also known as 1,3-dimethylxanthine, is a drug that inhibits phosphodiesterase and blocks adenosine receptors. [1] It is used to treat chronic obstructive pulmonary disease (COPD) and asthma. [2] Its pharmacology is similar to other methylxanthine drugs (e.g., theobromine and caffeine). [1]
Available in oral and injectable form, theophylline is a long-acting bronchodilator that prevents asthma episodes. It belongs to the chemical class methylxanthines (along with caffeine). It is prescribed in severe cases of asthma or those that are difficult to control. It must be taken 1–4 times daily, and doses cannot be missed.
It is a combination drug containing three active ingredients - theophylline, ephedrine, phenobarbital. [2] This medication relaxes the smooth muscle of the airways, making breathing easier. [ 3 ] The common side effects of Tedral include gastrointestinal disturbances , dizziness , headache and lightheadedness .
The effects of theophylline/ephedrine as a performance-enhancing drug in exercise and sports have been studied. [ 20 ] [ 21 ] Use of theophylline/ephedrine combinations has led to disqualification of elite athletes due to ephedrine being banned in competitive sports.
Aminophylline is a compound of the bronchodilator theophylline with ethylenediamine in 2:1 ratio. The ethylenediamine improves solubility, and the aminophylline is usually found as a dihydrate. [2] Aminophylline is less potent and shorter-acting than theophylline. Its most common use is in the treatment of airway obstruction from asthma or COPD ...
The fenethylline molecule results when theophylline is covalently linked with amphetamine by an alkyl chain. [8]Fenethylline is metabolized by the body to form two drugs, amphetamine (24.5% of oral dose) and theophylline (13.7% of oral dose), both of which are active stimulants.
R. S. V. ATC code R03 Drugs for obstructive airway diseases is a therapeutic subgroup of the Anatomical Therapeutic Chemical Classification System, a system of alphanumeric codes developed by the World Health Organization (WHO) for the classification of drugs and other medical products. [1][2][3] Subgroup R03 is part of the anatomical group R ...
Theophylline is a non-selective adenosine antagonist. It is also an anti-asthmatic agent and a demethylized metabolite of caffeine. Small open-label trials suggest that theophylline has anti-parkinsonian benefit but a double-blind, placebo-controlled trial did not clearly establish relief from symptoms. [3]