Applications of polyethylene glycol?

It is mainly used as a catalyst, and the amount used is not very large

Different grades of PEG have various applications, mainly as lubricants, humectants, dispersants, adhesives, and shaping agents. I mainly use solid forms of PEG4000 and PEG6000; a brief introduction to their use in formulations is provided below. Information on other specifications may not be accurate as I have not used them, so it is for reference only: Uses: tablets, film-coated tablets, droplet pills, capsules, suppositories, etc. Polyethylene glycol 4000 and polyethylene glycol 6000 are very useful as binders in tablets; during tablet formulation, they can enhance the ability of the tablets to release drugs, and they also give the tablet surface a glossy and smooth finish, making it less prone to damage. It also prevents sticking between sugar-coated tablets and sticking to the medicine bottle. Polyethylene glycol 6000 as a matrix for droplet pills: Polyethylene glycol is a type of matrix useful for preparing solid dispersions of poorly soluble drugs. Its advantages lie in the fact that the molecular weight of most organic drugs is below 400 or 500, whereas the molecular weights of polyethylene glycol are 1500, 4000, and 6000; this allows for the formation of interstitial solid solutions. When polyethylene glycol-drug is dissolved and the solution is cooled rapidly, it is very difficult to form nucleated crystals; due to the high viscosity of the medium at low temperatures, the solidification time is short, allowing the solute to form microcrystals. Polyethylene glycol is transparent in the visible and ultraviolet range, so it can be detected directly using visible light or ultraviolet light in assay and dissolution tests. PEG is a crystalline water-soluble polymer; each molecule contains two helical units. When ethylene glycol-based drugs are solidified, a large amount of these drugs can be contained within the spaces between these helices. Acting as a matrix, it enables the drugs to be released at a rapid rate. The following is a review of the applications of polyethylene glycol (PEG) in the pharmaceutical industry, which mainly include the following aspects: First, polyethylene glycol (PEG) is used in liquid formulations. Liquid polyethylene glycol PEG(400/600) can be mixed with water in any proportion; it has broad compatibility with various solvents, making it an excellent solvent and solubilizer that is widely used in liquid formulations. When vegetable oil is not suitable as a carrier for active ingredient formulations, polyethylene glycol (PEG) is the preferred material. Liquid polyethylene glycol (PEG) has the following advantages when used in injections: 1. Polyethylene glycol (PEG) products are non-toxic and non-irritating. 2. Polyethylene glycol (PEG) is stable and does not deteriorate easily; injections containing PEG remain safe and stable when heated to 150 degrees Celsius. 3. It can be mixed with most drugs for pharmaceutical formulation. 4. Injections using polyethylene glycol (PEG) are more easily absorbed, with a faster release of the drug’s effects. In soft capsule production, vegetable oil serves as a dispersion medium suitable for hydrophobic drugs, while liquid polyethylene glycol (PEG) is miscible with water in any proportion and can be used as a new dispersion medium for soft capsules to address drug dissolution issues. In eye drops, polyethylene glycol (PEG) is used as a thickening agent for drugs, which increases the time of contact with the eye mucosa and allows the active ingredient to enter the eye more smoothly. II: Polyethylene glycol (PEG) used as an ointment base. Polyethylene glycol (PEG) has a wide range of viscosities, and mixtures of PEGs with different molecular weights can achieve a certain consistency suitable for use in ointments (such as a mixture of PEG 400 and PEG 1500). These properties enable them to exhibit good solubility and compatibility with drugs, making them suitable as bases for ointments. Its advantages are: · Polyethylene glycol (PEG) is non-toxic and non-irritating; it does not cause skin allergies, and it remains stable and does not deteriorate over time. · It has good water solubility, and when used in ointments with polyethylene glycol (PEG), it can be easily removed from the skin, hair, and clothing. · The moisturizing properties of polyethylene glycol (PEG) can be applied to oily skin, and its light color remains inconspicuous on the skin surface. · Polyethylene glycol (PEG) has good stability, and applying the ointment to the skin does not affect human sweating. · Polyethylene glycol (PE) G is hygroscopic; ointments containing polyethylene glycol (PEG) have the effect of cleaning and drying surfaces, and are used to treat inflammation, exudative fluid, dermatitis, and other conditions. · Polyethylene glycol (PEG) has good compatibility with other drugs, so PEG-based ointment matrices are an excellent solvent for medications used to treat skin injuries and inflammation. · Since polyethylene glycol (PEG) does not undergo electrolysis, the pH value can be adjusted to any desired level. III: Polyethylene glycol (PEG) as a matrix for suppositories. Polyethylene glycol (PEG) possesses good water solubility and a wide range of melting points. By combining PEG-1000, 1500, 4000, and 6000 in appropriate proportions and heating them to melt, matrices with various properties can be created. These matrices allow the drug to be gradually released into body fluids, thereby exerting their effect. Their advantages include the fact that they have no physiological effects; as matrices, they are not affected by melting points and do not soften in hot weather. They also do not require refrigeration, and they cause less irritation compared to traditional lipid-based matrices. IV: Polyethylene glycol (PEG) is used in tablets and film coatings. The main types of polyethylene glycol used in the production of tablets and film coatings are PEG 4000 and PEG 6000. Thanks to its excellent stability, lubricity, water solubility, adhesiveness, and thermal stability, PEG offers the following advantages in manufacturing: 1. It has good compatibility with the active pharmaceutical ingredients. 2. The plasticity of polyethylene glycol (PEG) facilitates the shaping of tablets. 3. It can improve the ability of tablets to release drugs. 4. Polyethylene glycol (PEG) gives the tablet a glossy and smooth surface, while also making it less prone to cracking. 5. It can prevent the sugar-coated tablets from sticking to each other as well as from sticking to the medicine bottle. V: Polyethylene glycol (PEG) is used as a matrix for droplet pills. It serves as a matrix for preparing solid dispersions of poorly soluble drugs, and is commonly used in droplet pills. The main types of polyethylene glycol (PEG) used are PEG 4000 and PEG 6000. Among water-soluble matrices, PEG 6000 and PEG 4000 have the following characteristics: 1. PEG 4000 and PEG 6000 have stable chemical properties; they do not react with the active drug and do not undermine its efficacy. 2. Polyethylene glycol (PEG) 4000 and 6000 have a wide melting range; they melt into a liquid when heated (at 60°C to 80°C), and then solidify again upon rapid cooling (remaining in a solid state at room temperature). They retain these properties even after the addition of a certain amount of drug. 3. Pharmaceutical polyethylene glycol (PEG) 4000 and 6000 are non-toxic, non-irritating, and harmless to the human body. 　　 4. Polyethylene glycol (PEG) is transparent in the visible and ultraviolet range; therefore, it can be detected directly using visible light or ultraviolet light in assays for content determination and dissolution testing. 5. Polyethylene glycol (PEG) is a crystalline water-soluble polymer that, when used as a matrix, can accelerate the dissolution rate of drugs. 6: Polyethylene glycol (PEG) is used in powders. Polyethylene glycol (PEG) is a high-molecular polymer. Polyethylene glycol (PEG) 4000 has a significant therapeutic effect on chronic functional constipation in adults. Due to the lack of enzymes in the intestine that can degrade polyethylene glycol (PEG), it is not broken down by intestinal bacteria. When taken orally, it utilizes hydrogen bonds within its molecule to retain water molecules, thereby softening the stool and making it easier to excrete. However, there is no significant increase in the amount of stool produced; it is therefore a type of osmotic laxative. Its advantages are: 1. It can effectively relieve the accompanying symptoms of constipation such as abdominal distension, abdominal pain, difficulty in defecation, and loss of appetite in patients. 2. It has stable efficacy, good patient tolerance, is safe, and does not affect the absorption of fat-soluble vitamins. Last edited by zjjkyyw on 2009-3-4 12:42.]