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November 19, 2025
Theophylline powder is a type of methylxanthine alkaloid with the chemical formula C₇H₈N₄O₂. It appears as a white crystalline powder, has a slightly bitter taste, is insoluble in water (1:120) and ethanol, and is easily soluble in alkaline solutions. It is a compound naturally present in tea and coffee, but pharmaceutical-grade theophylline is mostly synthesized chemically.
Pharmacological effects and uses:
Theophylline inhibits phosphodiesterase (PDE) and blocks adenosine receptors, relaxing the smooth muscles of the bronchi. It is a classic bronchodilator and is used to treat asthma, chronic obstructive pulmonary disease (COPD), and premature infant apnea. Its effects include dilating the airways, anti-inflammatory, and enhancing diaphragm contractility.
Notes:
It has a synergistic effect with caffeine and should not be used together.
Patients with liver diseases and heart failure need to adjust their dosage.
The common form of preparation is sustained-release tablets. Powders are mostly used in laboratories or for the development of special preparations.
It should be sealed and stored in a dark place to prevent moisture and decomposition.
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Chemical Formula |
C7H8N4O2 |
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Exact Mass |
180 |
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Molecular Weight |
180 |
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m/z |
180 (100.0%), 181 (7.6%) |
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Elemental Analysis |
C, 46.67; H, 4.48; N, 31.10; O, 17.76 |
Pharmacokinetics:
Oral absorption is rapid, but there is significant individual variation (affected by age and liver enzymes). The plasma half-life is approximately 6-12 hours. Monitoring of blood drug concentration is necessary (therapeutic window is narrow: 5-20 μg/mL). Excessive dosage may cause toxic reactions such as palpitations and convulsions.
The function of theophylline powder in refreshing and awakening the brain mainly stems from its properties as a central nervous system stimulant.
The following is a detailed explanation of the function of theophylline in refreshing and awakening the mind:
1. Stimulate the central nervous system
It can directly act on the central nervous system, especially certain neurotransmitters in the brain, such as dopamine and norepinephrine. These neurotransmitters play a crucial role in regulating attention, alertness, and mental activity. By stimulating the release of these neurotransmitters, the activity of the brain can be increased, keeping people alert and alert.
2. Increase attention
Due to its ability to enhance the activity of the central nervous system, it can improve human attention and concentration. This enables people to maintain better performance when performing tasks that require high concentration, such as studying, working, or driving.
3. Improve reaction speed
It can also accelerate the transmission speed of neural signals, thereby improving human reaction speed. This enables people to react more quickly and improve their ability to respond when faced with unexpected situations or the need to make quick decisions.
4. Relieve fatigue
Long hours of work or study can lead to fatigue, which can help alleviate fatigue and restore mental vitality by stimulating the central nervous system. This is of great significance for improving work efficiency and learning outcomes.
5. Improve emotions
It can also affect a person's emotional state. Some studies have shown that it can improve a person's emotional level, making them feel more joyful and relaxed. This also has a certain positive effect on relieving tension and improving sleep quality.
Theophylline powder can also enhance the human immune system, enhance the body's resistance, and reduce the occurrence of diseases. It enhances the activity and quantity of immune cells by regulating the function of the immune system, thereby enhancing the body's resistance to diseases.
The function of theophylline in enhancing immunity is mainly manifested in the following aspects:
1. Promote the activity of immune cells
After absorption, it can quickly enter tissues such as the blood, liver, and brain, thereby mobilizing human immune cells, such as gamma Delta T-cells, to resist the invasion of viruses, bacteria, and fungi. The mechanism of this action is to promote the secretion of interferon by T-shaped cells, forming a "chemical defense line" for the human body to resist infection.
2. Improve the immune cell's resistance ability
According to research by Brigham and Women's Hospital at Harvard University, long-term consumption of more than 5 cups of tea drinks per day has significant effects on combating infectious diseases and improving immunity. This indicates that the intake of this substance is sufficient to significantly enhance the body's ability to resist specific bacterial infections.
3. Synergistic effect with tea polyphenols
The tea polyphenols in tea are also key factors in enhancing immunity. Tea polyphenols have antioxidant properties and can enhance the body's immune system. At the same time, tea polyphenols also have antibacterial effects, such as inhibiting Staphylococcus, Escherichia coli, Bacillus subtilis, etc., further protecting the body from infection.
4. Anti inflammatory and immunomodulatory effects
In recent years, with in-depth research on its pharmacological effects, it has been found that low doses of this substance have anti-inflammatory and immunomodulatory effects. This further enhances the status of the substance in the treatment of respiratory diseases and may have potential therapeutic effects on other immune related diseases.
5. Promoting intestinal health
The theophylline and other components in tea, such as cellulose, can promote intestinal peristalsis and enhance intestinal health. Intestinal health is closely related to the body's immune system, therefore, maintaining intestinal health indirectly enhances the body's immune system.
6. Antioxidant effects
It also has a certain antioxidant effect, which can eliminate free radicals in the body, prevent cell damage and aging. Free radicals are one of the main factors leading to cell damage and aging. Therefore, the antioxidant effect of theophylline helps to protect cells and maintain normal immune function in the body.
Theophylline was initially extracted from tea and chemically identified by German biologist Albrecht Kossel.
Emil Fischer and Lorenz Ach described a chemical synthesis method starting from 1,3-dimethyluric acid.
Another German scientist Wilhelm Traube introduced a new method for synthesizing theophylline - the Traube purine synthesis method.
Theophylline was first used clinically as a diuretic. Twenty years later, theophylline was first reported as a treatment for asthma.
This medicine was made into syrup formulations Theostat 20 and Theostat 80.
It was made into a tablet called Quibron.
Firstly, in this synthesis method, we prepared theophylline from 1,3-dimethyl-4-amino-5-formamide uracil as the starting material by reacting with sodium hydroxide. The following are the detailed steps and corresponding chemical equations:
-Firstly, gradually add 1,3-dimethyl-4-amino-5-formamide uracil to the sodium hydroxide solution.
-React at 90-95 ℃ and stir the mixture to fully react.
-During the reaction process, 1,3-dimethyl-4-amino-5-formamidomyrimidine reacts with sodium hydroxide to form theophylline. The possible chemical equations for the reaction are as follows:
1,3-dimethyl-4-amino-5-formamidomyluracil+NaOH → C7H8N4O2+other products
-Cool the reaction mixture to room temperature, at which point crude theophylline will be obtained.
-Dissolve the crude theophylline in hot water and gradually cool it to room temperature to promote the recrystallization of theophylline.
-Filter to obtain recrystallized theophylline crystals.
-Process the recrystallized theophylline solution through an activated carbon column to remove impurities and improve product purity.
-Collect the theophylline solution that has been decolorized by activated carbon, crystallize or dry it again, and finally obtain a high-purity theophylline product.
Through the above steps, we successfully synthesized theophylline powder and obtained high-purity theophylline products through hot water recrystallization and activated carbon decolorization. The process of hot water recrystallization can improve the purity of the product, while activated carbon decolorization further purifies the product by adsorbing impurities. The meticulous operation and control of these steps ensure the quality and purity of the final product.
Theophylline, as an important alkaloid compound, has a wide range of applications in medicine and other fields. The design and optimization of this synthesis method provide a feasible approach for the efficient preparation of theophylline.
Like other methylated xanthine derivatives.
Theophylline has been shown to block TGF beta mediation through cAMP PKA, thereby inhibiting the conversion of lung fibroblasts to myofibroblasts in COPD and asthma, and suppressing COL1 mRNA encoding collagen.
(1)
Competitive non selective phosphodiesterase inhibitors can increase intracellular levels of cyclic adenosine monophosphate (cAMP), activate cAMP dependent protein kinase (PKA), inhibit TNF - α - mediated effects, suppress leukotriene synthesis, alleviate inflammation and innate immunity.
(2)
Non selective adenosine receptor antagonists almost equally antagonize A1, A2, and A3 receptors, which explains their many effects on the heart.
It has been shown that theophylline can reverse steroid insensitivity in clinical observations of smokers with chronic obstructive pulmonary disease and asthma (smoking is a condition that leads to oxidative stress) through a clear independent mechanism. Theophylline can restore the reduced activity of HDAC (histone deacetylase) caused by oxidative stress (i.e. cell apoptosis). In addition, theophylline has been shown to directly activate HDAC2. Corticosteroids shut down the inflammatory response by blocking the expression of inflammatory mediators through histone deacetylation, which is mediated by histone deacetylase-2 (HDAC2). Once deacetylated, DNA is repackaged, rendering the promoter regions of inflammatory genes unusable for binding transcription factors such as NF - κ B, which initiates inflammatory activity. Recent studies have shown that oxidative stress associated with cigarette smoke can inhibit the activity of HDAC2, thereby blocking the anti-inflammatory effects of corticosteroids.
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