Pyrantel pamoate powder is an anthelmintic, chemical name [(E)-1,4,5,6-tetrahydro-1-methyl-2-[[(2-methyl-2-propenyl)oxy]carbonyl]-pyrimidin- 4-yl]-[2-(2-thienyl)vinyl]amine 1-Carboxylic Acid 2-(Diethylamino)ethyl Ester, molecular formula C34H30N2O6S, white or off-white crystalline powder. Insoluble in water, soluble in organic solvents such as alcohol, methanol, chloroform, acetone, etc.; soluble in boiling water, and susceptible to moisture. Relatively stable, not affected by light, heat and other factors. However, it decomposes under strong alkaline conditions and loses its activity. In order to ensure the quality and effectiveness of the product, it is necessary to avoid contact with strong acids and strong alkalis. It is mainly used in the fields of humans, pets, agriculture and animal husbandry to prevent and treat infections and diseases caused by parasites such as intestinal nematodes.
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Chemical Formula |
C34H30N2O6S |
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Exact Mass |
594 |
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Molecular Weight |
595 |
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m/z |
594 (100.0%), 595 (36.8%), 596 (6.6%), 596 (4.5%), 597 (1.7%), 596 (1.2%) |
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Elemental Analysis |
C, 68.67; H, 5.09; N, 4.71; O, 16.14; S, 5.39 |
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The use of thiapyrimidine dihydroxynaphthalate
Treatment of Ascariasis
Ascaris lumbricoides is a common parasitic infectious diseases. Ascaris lumbricoides parasitizes in the human small intestine and can cause abdominal pain, diarrhea and other symptoms. Dihydroxynaphthalate thiadiazine has shown significant advantages in the treatment of ascariasis. It achieves the goal of treating roundworm disease by inhibiting the absorption of worms into the bloodstream, reducing discomfort in patients, and killing adults and eggs. Dipyrimidine dihydroxynaphthalate has no toxic response to the host, so patients can use it with confidence.
Treatment of Enterobiosis
Pyrantel pamoate powder is a parasitic infectious diseases caused by malignant worms parasitism in human cecum and colon. Patients may experience symptoms such as itching around the anus and abnormal bowel movements. Dihydroxynaphthalate thiadiazine also has good therapeutic effects in the treatment of pinworm disease. It inhibits the absorption of blood by the parasite, causing it to lose vitality and be excreted from the body. Meanwhile, thiadiazine dihydroxynaphthalate can also alleviate discomfort symptoms in patients and improve their quality of life.
Treatment of hookworm infection
Hookworm is a parasite that parasitizes the human intestine and can cause serious problems such as anemia and malnutrition. Dihydroxynaphthalate thiadiazine also has significant advantages in treating hookworm infections. It aims to treat hookworm infection by inhibiting the absorption of blood by the parasite, alleviating anemia symptoms in patients, and killing adult hookworm worms and eggs. The mechanism of action of thiadiazine dihydroxynaphthalate is unique, and it has higher efficacy and safety compared to other deworming drugs.
Treatment of whipworm disease
Whipworm disease is a parasitic infectious diseases caused by whipworm parasitism in human intestinal tract. Patients may experience symptoms such as abdominal pain and diarrhea. Dihydroxynaphthalate thiadiazine also has certain therapeutic effects in the treatment of whipworm disease. It inhibits the absorption of blood by the parasite and causes it to lose vitality, thereby being excreted from the body. The broad-spectrum nature of thiapyrimidine dihydroxynaphthalate also has potential application value in the treatment of whipworm disease.
Treatment of parasitic diseases in livestock
In addition to treating human parasitic diseases, thiadiazine dihydroxynaphthalate can also be used for the treatment of various gastrointestinal nematodes in livestock. Parasitic diseases in livestock are one of the common diseases in the livestock breeding industry, which have a serious impact on the growth and development of livestock. The broad-spectrum and high efficiency of thiadiazine dihydroxynaphthalate make it widely applicable in the treatment of parasitic diseases in livestock. By inhibiting the cholinesterase of livestock parasites and causing them to lose their vitality, thiazide dihydroxynaphthalate can effectively control the occurrence and spread of parasitic diseases in livestock.
Pyrantel pamoate powder is a synthetic anthelmintic, and its synthesis method mainly has the following methods:
Esterification of Pyrantel base with pamoic acid:
First react Pyrantel base with pamoic acid in ethanol, then add dimethylaminoethyl chloride to catalyze the reaction. Then filter, remove the solvent and residual inorganic salts to obtain Pyrantel pamoate.
The acid-base reaction between Pyrantel base and potassium pamoate:
First dissolve the Pyrantel base with ethanol, then add water-soluble potassium pamoate to react. After the reaction, neutralize with acid and base, and then block the process with ethanol to form Pyrantel pamoate.
Acylation of Pyrantel base with pamoic acid:
In the presence of nitrobenzene or trifluorotoluene, react Pyrantel base and pamoic acid in tetrahydrofuran, catalyzed by the addition of methanol and sodium hydroxide, until the reaction is complete. After the reaction, the corpus luteum is separated, and then gradually purified with tetrahydrofuran, ethanol and a water-insoluble solvent to finally obtain Pyrantel pamoate.
The above are several synthetic methods of Pyrantel pamoate, each method has its advantages and disadvantages and scope of application. In industrial production, it is necessary to select a suitable synthesis method according to the actual situation, and adopt suitable process conditions to control the reaction process and obtain high-quality products.
Pyrantel pamoate powder is a basic compound with the following main reactivity properties:
Reaction with acid:
Pyrantel pamoate can undergo acid-base reactions with acids. Under acidic conditions, the drug will lose its alkalinity, resulting in reduced activity or loss of effect.
Reaction with oxidants:
Pyrantel pamoate can react with oxidants (such as hydrogen peroxide, potassium permanganate, etc.), and the drug will be oxidized, resulting in a change in molecular structure and loss of activity, so it is necessary to avoid contact with oxidants.
Reaction with reducing agent:
Pyrantel pamoate can react with reducing agents (such as sodium nitrite, ferrous sulfate, etc.), the drug will be reduced, and may decompose and lose its activity, so it is necessary to avoid contact with reducing agents.
Reaction with metal ions:
Pyrantel pamoate can form complexes with some metal ions, which may also lead to reduced activity in some cases.
In short, Pyrantel pamoate has basic reaction properties, which need to be strictly controlled and avoided in drug preparation, storage, processing and other links to ensure the quality and potency of drugs. In addition, when using Pyrantel pamoate, we should also be careful to avoid unnecessary reactions between Pyrantel pamoate and other chemical reagents.
Dihydroxynaphthalene dicarboxylate thiacloprid is a broad-spectrum nematode repellent that plays an important role in the fields of medicine and veterinary medicine. With its unique mechanism of action, it can effectively combat various nematode infections and alleviate the health threats posed by nematodes to numerous patients and animals. In terms of human health, it plays a key role in repelling diseases caused by nematode infections, such as intestinal nematode disease, and helps patients recover their health. In the field of veterinary medicine, it is widely used for nematode control in livestock, poultry and other animals, ensuring the development of animal husbandry and animal welfare.
Drug mechanism of action
Essentially, it belongs to acetylcholinesterase drugs. Under normal physiological conditions, cholinesterase in insect muscles plays a crucial role in breaking down acetylcholine, thereby regulating muscle contraction and relaxation. However, when it enters the insect body, it specifically inhibits the activity of cholinesterase in the insect muscle. This is like pressing the 'pause button' on the breakdown process of acetylcholine, preventing it from being broken down normally. With the continuous accumulation of acetylcholine in the insect muscles, the insect muscles will continue to be stimulated and contract. This sustained contraction exceeds the normal tolerance range of the worm's muscles, ultimately leading to spastic paralysis, causing the nematode to lose its ability to move and be expelled from the body, achieving the goal of deworming.
Comparison with Organophosphate Compounds
This mechanism of action is similar to that of organic phosphate compounds. Organophosphate compounds are a class of compounds widely used in both agriculture and medicine. In agriculture, as a commonly used insecticide, it can effectively kill various pests and protect crops from pest invasion. In the field of medicine, it is also used for clinical treatment of certain neurological diseases, such as Parkinson's disease. The dopaminergic neurons in Parkinson's disease patients' brains are damaged, leading to relative hyperactivity of the acetylcholine system. Organophosphate compounds inhibit the activity of acetylcholinesterase, prevent the breakdown of acetylcholine, regulate the balance of neurotransmitters to a certain extent, and alleviate symptoms.
pharmacokinetics
After oral administration of thiamethoxamer, the drug will be rapidly absorbed into the bloodstream in the intestine. Intestinal mucosal epithelial cells have abundant transport proteins that can efficiently transport drugs into the bloodstream. After entering the bloodstream, the drug will circulate through the bloodstream and reach the liver. The liver is an important metabolic organ in the human body, containing a rich system of metabolic enzymes. Thiazide dihydroxyhumate undergoes a series of complex metabolic reactions in the liver, mainly through enzymatic reactions such as oxidation, reduction, hydrolysis, etc., to convert it into metabolites. The polarity of these metabolites is usually stronger than that of the original drug and easier to excrete from the body.
Excretory pathway
Pyrantel pamoate powder are mainly excreted from the body through feces, as the products metabolized by the liver enter the intestine with bile secretion and are then excreted with feces. Some metabolites will also be excreted through urine, which mainly depends on the physicochemical properties such as molecular size and polarity of the metabolites. Metabolites with smaller molecules and stronger polarity are more likely to enter urine through renal filtration and ultimately be excreted from the body.
The possibility of interaction between thiacloprid dihydroxyhumate and other drugs is relatively low, which provides certain convenience for clinical combination therapy. However, due to its inherent anticholinesterase properties, there may be interactions when used in combination with other drugs with anticholinesterase activity. For example, imidacloprid phosphate powder also has acetylcholinesterase activity.
If thiacloprid dihydroxynaphthalene salt is used together with imidacloprid phosphate powder, the acetylcholinesterase effects of the two drugs will overlap, leading to excessive accumulation of acetylcholine in the body, causing a series of serious neurological symptoms such as muscle tremors, convulsions, difficulty breathing, and even endangering life. Therefore, when using it, it is necessary to strictly avoid using it together with other drugs with anticholinergic ester activity to reduce the risk of drug interactions and ensure medication safety.
FAQ
What is pyrantel pamoate used for?
Pyrantel is used to treat pinworms (enterobiasis; oxyuriasis). This medicine may also be used for other worm infections as determined by your doctor. Pyrantel works by paralyzing the worms. They are then passed in the stool.
How much pyrantel pamoate should a human take?
Adults, children 12 years of age and over, and children 2 years to under 12 years of age - oral dosage is a single dose of 5 milligrams of Pyrantel Base per pound (or 11 milligrams per kilogram) of body weight, not to exceed 1 gram (4 teaspoonfuls).
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