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Zileuton is a minor substrate of CYP1A2, 2C8/9, 3A4, and a weak inhibitor of CYP 1A2. The drug has been shown to increase the serum concentration or effects of theophylline, propranolol, and warfarin, although significant increase in prothrombin time is not obvious. It is advised that the doses of each medication be monitored and/or reduced ...
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.
Theophylline is excreted unchanged in the urine (up to 10%). Clearance of the drug is increased in children (age 1 to 12), teenagers (12 to 16), adult smokers, elderly smokers, as well as in cystic fibrosis, and hyperthyroidism. Clearance of the drug is decreased in these conditions: elderly, acute congestive heart failure, cirrhosis ...
An adenosine receptor antagonist is a drug which acts as an antagonist of one or more of the adenosine receptors. [1] The best known are xanthines and their derivatives (natural: caffeine, [2] theophylline, [3] and theobromine; and synthetic: PSB-1901 [4]), but there are also non-xanthine representatives (e.g. ISAM-140, [5] ISAM-R316, [6] etrumadenant, [7] and AZD-4635 [8])
A 2A receptor antagonists may prevent hepatic cirrhosis, and pentoxifylline may inhibit phosphodiesterase and provide renal protection. [6]The A 2A receptor antagonists may be used for treatment of attention deficit hyperactivity disorder (), because of the receptors ability to regulate neurotransmission in the basal ganglia and cortex, particularly dopaminergic and glutamatergic signaling.
Isoniazid may increase the amount of phenytoin in the body. The doses of phenytoin may need to be adjusted when given with isoniazid. [40] [41] Isoniazid may increase the plasma levels of theophylline. There are some cases of theophylline slowing down isoniazid elimination. Both theophylline and isoniazid levels should be monitored. [42]
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 .
Viloxazine increased plasma levels of phenytoin by an average of 37%. [21] It also was known to significantly increase plasma levels of theophylline and decrease its clearance from the body, [ 22 ] sometimes resulting in accidental overdose of theophylline .
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