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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 ]
Pages for logged out editors learn more. Contributions; Talk; ... Print/export Download as PDF; ... theophylline: 0.4-0.7 [1] ethanol: 0.7-0.9 [1] neostigmine:
Phosphodiesterase-5. A phosphodiesterase inhibitor is a drug that blocks one or more of the five subtypes of the enzyme phosphodiesterase (PDE), thereby preventing the inactivation of the intracellular second messengers, cyclic adenosine monophosphate (cAMP) and cyclic guanosine monophosphate (cGMP) by the respective PDE subtype(s).
In recreational psychoactive drug spaces, duration refers to the length of time over which the subjective effects of a psychoactive substance manifest themselves. Duration can be broken down into 6 parts: (1) total duration (2) onset (3) come up (4) peak (5) offset and (6) after effects.
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Theophylline is a non-selective adenosine receptor antagonist. It is also an anti-asthmatic agent and a demethylated 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]
A combination of theophylline, ephedrine, and hydroxyzine has been marketed under the brand name Marax among others as well. [16] [17] [18] Combinations of theophylline, ephedrine, and a barbiturate were later phased out in favor of combinations of theophylline and ephedrine alone (e.g., brand name Franol).
Rather than becoming unsafe, they lose potency slowly over time.” ... and air are the “main enemies of vitamin freshness,” says Blatner. “Keep them cool, dry, and out of the sun.” So ...