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Bethanechol Injection, Methoxycholine chloride injection is a parasympathetic nervous system drug with specific pharmacological effects. In terms of clinical application, its indications mainly focus on digestive and urinary system dysfunction. In the digestive system, it can be used to treat gastrointestina laxity, such as postoperative, postpartum, or cases where gastrointestial motility is weakened due to long-term bed rest. It can promote gastrointestial motility and help restore normal digestive function; For postoperative abdominal bloating, symptoms can also be alleviated by accelerating the expulsion of intestinal gas. In the urinary system, it has a significant effect on non obstructive urinay retention, can enhance the contractility of bladder detrusor, and promote the excretion of urine; For patients with neurogenic bladder tension reduction, it can be used as an adjuvant therapy drug to improve urinay function. In addition, in the veterinary field, it can also be used to treat animals with retained placenta by promoting uterine contractions to expel the placenta.
Basic information
(1) Drug name
The Chinese name for Bethanecho is carbamoylcholine chloride injection, and the English name is Bethanecho Chloride Injection. Its Chinese pinyin is L ü hua Anjiaxian Jiadanjian Zhusheye.
(2) Classification of drugs
It belongs to the parasympathetic nervous system and is an agonist of muscarinic receptors (mAChRs), exerting its effects by directly stimulating mAChRs (M1, M2, M3, M4, M5) in the parasympathetic nervous system.
(3) Formulation and Specifications
The dosage form is injection, and common specifications include 1ml: 2.5mg, 5ml: 12.5mg, 10ml: 25mg, 10ml: 50mg, etc. Different specifications of injection solutions are suitable for animals of different weights and conditions, and veterinarians can choose the appropriate specifications for use according to the actual situation.
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Additional information of chemical compound:
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Bethanechol+. COA
Bethanechol Injection, as a parasympathetic nervous system drug, exerts its pharmacological effects by directly stimulating the muscarinic receptor (mAChR) and has a specific indication range in clinical practice.
Pharmacological Characteristics Fundamentals
It is an agonist of muscarinic receptors (mAChRs) and can directly stimulate mAChRs in the parasympathetic nervous system (including M1, M2, M3, M4, M5 subtypes). Compared to acetylcholine, Bethanecho is less easily hydrolyzed by cholinesterase in the body, making its effect more long-lasting. Its characteristic is that it has a high selectivity for the smooth muscles of the gastrointestial tract and bladder, and can significantly contract these smooth muscles, while its effect on the cardiovascular system is relatively weak. This pharmacological characteristic determines its unique advantage in treating diseases related to gastrointestial and bladder dysfunction.
Main indications
Gastrointestina relaxation
Pathological mechanism: Gastrointestial relaxation refers to the weakening or disappearance of gastrointestial motility function, resulting in food staying in the gastrointestial tract for too long, affecting digestion and absorption. Commonly seen in postoperative, postpartum, long-term bedridden, or patients with certain neurological disorders.
Mechanism of action: It can directly stimulate mAChR on gastrointestial smooth muscle, increase the tension and contractility of gastrointestial smooth muscle, promote gastrointestial peristalsis, and thus improve the symptoms of gastrointestial relaxation.
Clinical application: In the field of veterinary medicine, this drug is widely used to treat gastrointestial relaxation in animals such as dogs and cats. In human medicine, although injectable forms are relatively less commonly used, they can also be considered for the treatment of gastrointestial relaxation in certain special circumstances, such as when patients are unable to take the medication orally.
Postoperative abdominal distension
Pathological mechanism: After surgery, symptoms of abdominal distension often occur due to the influence of anesthetic drugs, stimulation of the gastrointestial tract by surgical procedures, and reduced patient activity. Abdominal distension not only causes discomfort to patients, but may also affect the healing of surgical incisions.
Mechanism of action: By promoting gastrointestial peristalsis and accelerating the expulsion of gas from the intestines, the symptoms of abdominal distension can be alleviated.
Clinica application: After abdominal surgery, when patients experience abdominal distension and other non pharmacological treatments are ineffective, it may be considered for use. However, it should be noted that contraindications such as mechanical intestinal obstruction should be ruled out before use.
Urinary retention
Pathological mechanism: Urinary retention refers to the accumulation of urine in the bladder without being discharged. Commonly seen in postpartum, postoperative, neurological damage, or patients with certain urinay system diseases. Non obstructive urinay retention is mainly caused by the weakness of bladder detrusor contractions or urethral sphincter spasm.
Action mechanism: It can stimulate mAChR on bladder smooth muscle, increase the tension and contraction of bladder detrusor, promote the excretion of urine, and thus alleviate the symptoms of urinay retention.
Clinica application: It is an effective drug for patients with non obstructive urinay retention. The drug can be used in time to prevent and treat urinay retention in postpartum, postoperative and other cases that are prone to urinay retention. However, it is also important to exclude contraindications such as urinay tract obstruction.
Neurogenic bladder tension reduction
Pathological mechanism: Neurogenic bladder is a disease characterized by abnormal bladder function caused by neurological disorders. When the innervation of the bladder is damaged, the contractility of the bladder detrusor will be weakened, resulting in decreased bladder tension, dysuria, urinary retention and other symptoms.
Mechanism of action: By directly stimulating mAChR on the smooth muscle of the bladder, the contractility of the detrusor muscle of the bladder is enhanced, and the tension of the bladder is increased, thereby improving the symptoms of neurogenic bladder.
Clinica application: Bethanechol Injection can be used as an adjuvant therapy to help patients with neurogenic bladder tension reduction restore normal bladder urination function. But it needs to be combined with other treatment methods, such as rehabilitation training, electrical stimulation, etc., to achieve better therapeutic effects.
Retained placenta
Pathological mechanism: Untamed placenta refers to the inability of the placenta to be expelled within the normal time after delivery. Commonly seen in livestock such as cows and horses, it may also occur during human childbirth. Failure to let go of the placenta can lead to complications such as intrauterine infection and bleeding, seriously affecting maternal health.
Mechanism of action: It can stimulate mAChR on uterine smooth muscle, increase the contractility of uterine smooth muscle, and promote the expulsion of placenta.
Clinica application: In the field of veterinary medicine, this drug is one of the commonly used drugs for treating placenta previa. In human medicine, although it is relatively less commonly used, it can also be considered for use in certain special situations, such as when the placenta cannot be lowered and other methods are ineffective. However, strict control of dosage and indications is required during use to avoid adverse reactions such as excessive uterine contractions.
Pyometra
Pathological mechanism: Uterine pyometra refers to the accumulation of a large amount of purulent secretions in the uterus, commonly found in female dogs, cats, and other animals that have not been sterilized. Uterine abscess can cause symptoms such as fever, loss of appetite, vomiting, and even life-threatening situations in animals.
Mechanism of action: It may alleviate symptoms of uterine abscess by promoting uterine contractions and helping to expel purulent secretions from the uterus. However, further research is needed on its specific mechanism of action and efficacy in the treatment of uterine abscess.
Clinica application: In veterinary clinica practice, it is sometimes used as an adjuvant treatment for uterine pyometra, but usually requires the combination of antibiotics and other treatment methods.
Basis for indications and clinical research support
Animal experimental research
Multiple animal experiments have shown that it has a significant contractile effect on the smooth muscles of the gastrointestial tract and bladder. For example, in rat experiments, after administering different doses of injection, a dose-dependent increase in water and urine intake was observed, and gastrointestial motility was also significantly enhanced. These experimental results provide a theoretical basis for the treatment of gastrointestial and urinay system dysfunction diseases.
Clinical case study
In clinica practice, there are also many case reports supporting indications. For example, it has been reported that for patients with postpartum urinay retention, most patients can recover their own urination in a short time after use. For animals with gastrointestial relaxation, the use of this drug also significantly improves their appetite and bowel movements.
Clinical trial research
Although there are relatively few large-scale clinica trials currently available, some small-scale clinica trials have also confirmed its efficacy in specific indications. For example, in a study targeting patients with neurogenic bladder, treatment with Bethanechol Injection resulted in a certain degree of improvement in bladder capacity and urinay function.
Precautions and contraindications for indication use
Precautions
Dosage and administration method:
The dosage and administration method of Bethanecho need to be adjusted according to the specific situation of the patient. Generally speaking, the commonly used dosage for subcutaneous injection is 0.02-0.04ml per 1kg body weight (taking 2.5mg/ml formulation as an example). When administering medication, attention should be paid to slow injection to avoid causing local pain and adverse reactions.
Monitoring and evaluation:
During use, it is necessary to closely monitor changes in the patient's symptoms and signs. If adverse reactions occur, the dosage should be adjusted or the medication should be stopped in a timely manner. At the same time, regularly evaluate the treatment effect and adjust the treatment plan according to changes in the condition.
Drug interactions:
There may be interactions with other drugs. For example, co administration with sympathetic ganglion blockers may cause a significant decrease in blood pressure. Therefore, when using this medication, attention should be paid to the patient's medication history to avoid drug interactions.
Contraindications
Mechanical obstruction:
It is contraindicated for patients with mechanical obstruction such as complete intestinal obstruction or urinary tract obstruction. Because the drug enhances the contractility of smooth muscles, it may worsen obstructive symptoms and worsen the condition.
Specific disease states:
Patients with hyperthyroidism, peptic ulcer, bronchial asthma, significant bradycardia, coronary heart disease, epilepsy, tremor paralysis, and other diseases should also avoid Bethanechol Injection. In these disease states, the patient's body has poor tolerance to the drug, and the use of the drug may cause serious adverse reactions.
Pregnant women:
Pregnant women are prohibited from using it. Because the medication may cause uterine contractions, increasing the risk of miscarriage or premature birth.
Advantages of safety and tolerability
The predictability of side effects
The side effects of amikacin, such as facial flushing, abdominal pain, and sweating, are all caused by excessive activation of peripheral M-type receptors and are dose-dependent. By adjusting the dosage or administration route (such as local injection), side effects can be effectively controlled.
Clear definition of contraindications
The contraindications for amikacin mainly include mechanical intestinal obstruction, urinary tract obstruction, glaucoma, and severe cardiovascular diseases (such as coronary heart disease). These contraindications are directly related to their peripheral mechanisms of action, avoiding the complex contraindications caused by central effects of traditional cholinergic drugs (such as mental illness and epilepsy).
Simplification of drug interactions
Aminocholine is not metabolized by the liver and does not induce or inhibit hepatic enzymes, therefore it has less interaction with other drugs. For example, when used in combination with antibiotics, antihypertensive drugs, or anticoagulants, there is no need to adjust the dosage.
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